Query: 223 go no go gauge

title: Forster Products NATO Chamber Headspace Gage, Rimless, Hardened Steel, Precision Ground
text: From the brand Straight shooters since 1935. Our story How we got our start Forster Products has a long history of excellence, beginning in the Forster brothers’ basement with model airplane engines. Today, we are a top supplier of quality Reloading and Gunsmithing Tools designed to expand the capabilities and improve the performance of reloading and shooting enthusiasts. What makes our product unique Our products have been made in rural America for over 80 years by people who care about your shooting success, informed by customer feedback and collaboration with our advisory panel of ProStaff, whose input helps us improve upon and develop the products that you need for the sport you love. Why we love what we do We’re passionate about precision and sport. We know that the control of key variables means the difference between shooting success and failure, and we work hard to ensure that the products we design, make, and sell meet and exceed your own high expectations for excellence. Product Description Forster Headspace Gages The most reliable means to test rifle chamber length Smart gunsmiths and shooters have long selected our headspace gages because each is manufactured from top-quality, hardened steel and precision ground to *American National Standards Institute SAAMI tolerances. When safety and performance are on the line, choose our headspace gages and receive the peace of mind that comes with knowing and understanding how to check your rifle’s headspace. *American National Standards Institute, New York, NY, represents and serves the diverse interests of more than 270,000 companies and organizations and 30 million professionals worldwide by promoting and facilitating voluntary consensus standards and conformity assessment systems, and safeguarding their integrity. All of our headspace gages are: Ground to an exacting ±.00015" headspace tolerance to ensure accurate testing of a rifle’s chamber. Carefully inspected with NIST-certified measurement tools. Made with painstaking care and rigorous manufacturing standards. Read more What is Headspace? According to the Sporting Arms and Ammunition Manufacturers' Institute (SAAMI), which sets product standards for firearms and ammunition, headspace is "the distance from the face of the closed breech of a firearm to the surface in the chamber on which the cartridge case seats." Some shooters are under the misconception that headspace is fixed over the life of the firearm. Headspace can increase after repeated use of ammunition that causes too much pressure. One should routinely check rifle chamber headspace every thousand rounds. Headspace is measured differently depending on whether the firearm’s caliber uses rimmed, belted, or rimless cartridges. Rimmed/Belted and Rimless Cartridges Rimmed and Belted Cartridges Headspace = distance between the bolt face and the top of the rim (chamber face) when the bolt is closed Rimless Cartridge Headspace Headspace = distance between the bolt face and a datum line (determined by SAAMI) where the front of the cartridge rests on its shoulder when the bolt is closed Read more Choosing the Correct Headspace Gage Forster Products offers three lengths of headspace gages per rifle caliber. In order from the shortest to longest, they are GO , NO-GO , and FIELD : 1. GO : Corresponds to the minimum chamber dimensions. If a rifle closes on a GO gage, the chamber will accept ammunition that is made to SAAMI maximum specifications. The GO gage is essential for checking a newly-reamed chamber in order to ensure a tight, accurate, and safe chamber that will accept SAAMI maximum ammo. 2. NO-GO : Corresponds to the maximum headspace we recommend for gunsmiths’ chambering new bolt-action rifles. This is not a SAAMI-maximum measurement. If a rifle closes on a NO-GO gage, it may still be within SAAMI specifications, or it may have excessive headspace. To determine if there is excessive headspace, the chamber should then be checked with a FIELD gage. The NO-GO gage is a valuable tool for gunsmiths’ reaming new chambers, in order to ensure tight and accurate headspace. 3. FIELD : Corresponds to the longest safe headspace. If a rifle closes on a FIELD gage, its chamber is dangerously close to, or longer than, SAAMI-specified maximum chamber size. If chamber headspace is excessive, the gun should be taken out of service until it has been inspected and repaired by a competent gunsmith. FIELD gages are slightly shorter than the SAAMI maximum in order to give a small safety margin. 

title: 5.56mm NATO MAX and 5.56mm NATO MIN Headspace Gauge Set

title: Forster Products 30-06 Headspace Gauge Set GO and NO-GO
text: Product Description Forster Headspace Gages The most reliable means to test rifle chamber length Smart gunsmiths and shooters have long selected our headspace gages because each is manufactured from top-quality, hardened steel and precision ground to *American National Standards Institute SAAMI tolerances. When safety and performance are on the line, choose our headspace gages and receive the peace of mind that comes with knowing and understanding how to check your rifle’s headspace. *American National Standards Institute, New York, NY, represents and serves the diverse interests of more than 270,000 companies and organizations and 30 million professionals worldwide by promoting and facilitating voluntary consensus standards and conformity assessment systems, and safeguarding their integrity. All of our headspace gages are: Ground to an exacting ±.00015" headspace tolerance to ensure accurate testing of a rifle’s chamber. Carefully inspected with NIST-certified measurement tools. Made with painstaking care and rigorous manufacturing standards. Read more What is Headspace? According to the Sporting Arms and Ammunition Manufacturers' Institute (SAAMI), which sets product standards for firearms and ammunition, headspace is "the distance from the face of the closed breech of a firearm to the surface in the chamber on which the cartridge case seats." Some shooters are under the misconception that headspace is fixed over the life of the firearm. Headspace can increase after repeated use of ammunition that causes too much pressure. One should routinely check rifle chamber headspace every thousand rounds. Headspace is measured differently depending on whether the firearm’s caliber uses rimmed, belted, or rimless cartridges. Rimmed/Belted and Rimless Cartridges Rimmed and Belted Cartridges Headspace = distance between the bolt face and the top of the rim (chamber face) when the bolt is closed Rimless Cartridge Headspace Headspace = distance between the bolt face and a datum line (determined by SAAMI) where the front of the cartridge rests on its shoulder when the bolt is closed Read more Choosing the Correct Headspace Gage Forster Products offers three lengths of headspace gages per rifle caliber. In order from the shortest to longest, they are GO , NO-GO , and FIELD : 1. GO : Corresponds to the minimum chamber dimensions. If a rifle closes on a GO gage, the chamber will accept ammunition that is made to SAAMI maximum specifications. The GO gage is essential for checking a newly-reamed chamber in order to ensure a tight, accurate, and safe chamber that will accept SAAMI maximum ammo. 2. NO-GO : Corresponds to the maximum headspace we recommend for gunsmiths’ chambering new bolt-action rifles. This is not a SAAMI-maximum measurement. If a rifle closes on a NO-GO gage, it may still be within SAAMI specifications, or it may have excessive headspace. To determine if there is excessive headspace, the chamber should then be checked with a FIELD gage. The NO-GO gage is a valuable tool for gunsmiths’ reaming new chambers, in order to ensure tight and accurate headspace. 3. FIELD : Corresponds to the longest safe headspace. If a rifle closes on a FIELD gage, its chamber is dangerously close to, or longer than, SAAMI-specified maximum chamber size. If chamber headspace is excessive, the gun should be taken out of service until it has been inspected and repaired by a competent gunsmith. FIELD gages are slightly shorter than the SAAMI maximum in order to give a small safety margin. 

title: Lyman 7833020 Single Caliber Ammo Checker.223 Remington
text: Product Description Lyman multi-caliber ammo checkers have proven to be extremely popular with reloaders since their introduction last year. Ammo checkers are gauges that verify the quality and consistency of both reloaded and factory ammo. They are machined from solid aluminum and cut with custom tooling to SAAMI minimum chamber tolerances. Just drop your cartridge into the gauge and if it fits, it will chamber in your gun. This year, Lyman is expanding their line of ammo checkers into other calibers that are not included in the multi-caliber blocks. Each gauge is clearly marked for caliber and is anodized in a bright orange color so that they will be easy to spot on your reloading bench. Features: - accuracy and safety- verify the quality and consistent of both reloaded and factory ammo - easy to use- just drop your cartridge into the gauge and if it fits, it will chamber in your firearm - high quality materials- machined from solid 6061 T6 Aircraft grade aluminum, and cut with custom tooling to SAAMI minimum chamber dimensions specifications: - caliber: .223 Rem - weight: .5 lb. Product Description Lyman multi-caliber ammo checkers have proven to be extremely popular with reloaders since their introduction last year. Ammo checkers are gauges that verify the quality and consistency of both reloaded and factory ammo. They are machined from solid aluminum and cut with custom tooling to SAAMI minimum chamber tolerances. Just drop your cartridge into the gauge and if it fits, it will chamber in your gun. This year, Lyman is expanding their line of ammo checkers into other calibers that are not included in the multi-caliber blocks. Each gauge is clearly marked for caliber and is anodized in a bright orange color so that they will be easy to spot on your reloading bench. Features: - accuracy and safety- verify the quality and consistent of both reloaded and factory ammo - easy to use- just drop your cartridge into the gauge and if it fits, it will chamber in your firearm - high quality materials- machined from solid 6061 T6 Aircraft grade aluminum, and cut with custom tooling to SAAMI minimum chamber dimensions specifications: - caliber: .223 Rem - weight: .5 lb.From the manufacturer Lyman is expanding their line of Ammo Checkers into other calibers that are not included in the multi-caliber blocks. Each gauge is clearly marked for caliber and is anodized in a bright orange color so that they will be easy to spot on your reloading bench. Lyman’s multi-caliber Ammo Checkers have proven to be extremely popular with reloaders since their introduction. Ammo Checkers are gauges that verify the quality and consistency of both reloaded and factory ammo. They are machined from solid aluminum and cut with custom tooling to SAAMI minimum chamber tolerances. Just drop your cartridge into the gauge and if it fits, it will chamber in your gun. Read more About Us "Brands That Perform" means something here at Lyman. Performance means more than just getting the job done. It means delivering value while advancing technology. Most important it means listening to the needs of shooters. In fact, the development of our products is most often directly linked to the feedback we get from our customers and the retailers who supply them. Whether pioneering the use of digital technology in reloading tools or reintroducing "antique" calibers and bullet moulds, Lyman continues to improve and innovate the tools and reloading supplies used by serious shooters and reloaders. 

title: Lyman Products MSR Ammo Checker Block
text: Product Description Lyman MSR ammo checkers are machined from solid blocks of 6061 T6 Aircraft grade aluminum and cut with custom tooling to minimum chamber dimensions. Their black anodized finish matches your favorite "black" rifle. Check the quality and consistency of both loaded rounds and purchased ammo. A must for any AR shooter. You can't afford mis-feeds, so get the easiest "go" gauge available for modern sporting rifle calibers. Product Description Lyman MSR ammo checkers are machined from solid blocks of 6061 T6 Aircraft grade aluminum and cut with custom tooling to minimum chamber dimensions. Their black anodized finish matches your favorite "black" rifle. Check the quality and consistency of both loaded rounds and purchased ammo. A must for any AR shooter. You can't afford mis-feeds, so get the easiest "go" gauge available for modern sporting rifle calibers.From the manufacturer Lyman Products MSR Ammo Checker Block Lyman MSR Ammo Checkers are machined from solid blocks of 6061 T6 aircraft grade aluminum and cut with custom tooling to minimum chamber dimensions. Their black anodized finish matches your favorite “black” rifle. Check the quality and consistency of both loaded rounds and purchased ammo. A must for any AR shooter. You can’t afford mis-feeds, so get the easiest “Go” gauge available for modern sporting rifle calibers. Covers 223/5.56, 6.5 Grendel, 6.8 Rem. SPC, 7.62x39, 300AAC Blackout, 450 Bushmaster, 458 SOCOM and 50 Beowulf CNC machined to minimum chamber specs Confirm ammo will chamber smoothly Read more About Us "Brands That Perform" means something here at Lyman. Performance means more than just getting the job done. It means delivering value while advancing technology. Most important it means listening to the needs of shooters. In fact, the development of our products is most often directly linked to the feedback we get from our customers and the retailers who supply them. Whether pioneering the use of digital technology in reloading tools or reintroducing "antique" calibers and bullet moulds, Lyman continues to improve and innovate the tools and reloading supplies used by serious shooters and reloaders. Read more 

title: Hornady Lock-N-Load Cartridge Gauge 223 REM (.224), 380707 - Reloading Supplies to Help Check Cases & Ammo Specifications-Caliber Specific, Cylindrical Precision Steel Gauges Fit SAAMI Tolerances
text: From the brand Previous page Next page Product Description Read more Read more 

title: 308 Winchester Headspace Gauge Set GO - NO-GO - Field
text: Product Description Every gunsmith knows that proper use of a headspace gage is the most reliable way to test the length of a rifle chamber. “Headspace” is the distance between the face of the breech and the base of the cartridge when the action is closed, and excessive headspace can be dangerous as well as impair accuracy. For instance, unsupported brass fired in a rifle action with excessive headspace can rupture, allowing gas to blow rearward like rocket exhaust. Because your safety is on the line, Forster Headspace Gages are made with painstaking care and exacting manufacturing standards to ensure accurate testing of your rifle’s chamber. If a rifle closes on a GO gage, the rifle chamber will accept any ammunition that is made within SAAMI (industry standard) specifications. If a rifle closes on a NOGO gage, the rifle chamber might have excessive headspace. Most gunsmiths chamber a rifle’s headspace between the GO and NOGO dimensions. If a rifle closes on a FIELD gage, the rifle chamber is dangerously close to or already over the SAAMI specified maximum chamber size. Product Description Every gunsmith knows that proper use of a headspace gage is the most reliable way to test the length of a rifle chamber. “Headspace” is the distance between the face of the breech and the base of the cartridge when the action is closed, and excessive headspace can be dangerous as well as impair accuracy. For instance, unsupported brass fired in a rifle action with excessive headspace can rupture, allowing gas to blow rearward like rocket exhaust. Because your safety is on the line, Forster Headspace Gages are made with painstaking care and exacting manufacturing standards to ensure accurate testing of your rifle’s chamber. If a rifle closes on a GO gage, the rifle chamber will accept any ammunition that is made within SAAMI (industry standard) specifications. If a rifle closes on a NOGO gage, the rifle chamber might have excessive headspace. Most gunsmiths chamber a rifle’s headspace between the GO and NOGO dimensions. If a rifle closes on a FIELD gage, the rifle chamber is dangerously close to or already over the SAAMI specified maximum chamber size.

title: Forster Products SAAMI Dimensioned Headspace Gage, Rimmed and Belted, Hardened Steel, Precision Ground
text: From the brand Straight shooters since 1935. Our story How we got our start Forster Products has a long history of excellence, beginning in the Forster brothers’ basement with model airplane engines. Today, we are a top supplier of quality Reloading and Gunsmithing Tools designed to expand the capabilities and improve the performance of reloading and shooting enthusiasts. What makes our product unique Our products have been made in rural America for over 80 years by people who care about your shooting success, informed by customer feedback and collaboration with our advisory panel of ProStaff, whose input helps us improve upon and develop the products that you need for the sport you love. Why we love what we do We’re passionate about precision and sport. We know that the control of key variables means the difference between shooting success and failure, and we work hard to ensure that the products we design, make, and sell meet and exceed your own high expectations for excellence. Product Description Forster Headspace Gages The most reliable means to test rifle chamber length Smart gunsmiths and shooters have long selected our headspace gages because each is manufactured from top-quality, hardened steel and precision ground to *American National Standards Institute SAAMI tolerances. When safety and performance are on the line, choose our headspace gages and receive the peace of mind that comes with knowing and understanding how to check your rifle’s headspace. *American National Standards Institute, New York, NY, represents and serves the diverse interests of more than 270,000 companies and organizations and 30 million professionals worldwide by promoting and facilitating voluntary consensus standards and conformity assessment systems, and safeguarding their integrity. All of our headspace gages are: Ground to an exacting ±.00015" headspace tolerance to ensure accurate testing of a rifle’s chamber. Carefully inspected with NIST-certified measurement tools. Made with painstaking care and rigorous manufacturing standards. Read more What is Headspace? According to the Sporting Arms and Ammunition Manufacturers' Institute (SAAMI), which sets product standards for firearms and ammunition, headspace is "the distance from the face of the closed breech of a firearm to the surface in the chamber on which the cartridge case seats." Some shooters are under the misconception that headspace is fixed over the life of the firearm. Headspace can increase after repeated use of ammunition that causes too much pressure. One should routinely check rifle chamber headspace every thousand rounds. Headspace is measured differently depending on whether the firearm’s caliber uses rimmed, belted, or rimless cartridges. Rimmed/Belted and Rimless Cartridges Rimmed and Belted Cartridges Headspace = distance between the bolt face and the top of the rim (chamber face) when the bolt is closed Rimless Cartridge Headspace Headspace = distance between the bolt face and a datum line (determined by SAAMI) where the front of the cartridge rests on its shoulder when the bolt is closed Read more Choosing the Correct Headspace Gage Forster Products offers three lengths of headspace gages per rifle caliber. In order from the shortest to longest, they are GO , NO-GO , and FIELD : 1. GO : Corresponds to the minimum chamber dimensions. If a rifle closes on a GO gage, the chamber will accept ammunition that is made to SAAMI maximum specifications. The GO gage is essential for checking a newly-reamed chamber in order to ensure a tight, accurate, and safe chamber that will accept SAAMI maximum ammo. 2. NO-GO : Corresponds to the maximum headspace we recommend for gunsmiths’ chambering new bolt-action rifles. This is not a SAAMI-maximum measurement. If a rifle closes on a NO-GO gage, it may still be within SAAMI specifications, or it may have excessive headspace. To determine if there is excessive headspace, the chamber should then be checked with a FIELD gage. The NO-GO gage is a valuable tool for gunsmiths’ reaming new chambers, in order to ensure tight and accurate headspace. 3. FIELD : Corresponds to the longest safe headspace. If a rifle closes on a FIELD gage, its chamber is dangerously close to, or longer than, SAAMI-specified maximum chamber size. If chamber headspace is excessive, the gun should be taken out of service until it has been inspected and repaired by a competent gunsmith. FIELD gages are slightly shorter than the SAAMI maximum in order to give a small safety margin. 

title: Lyman Ammo Checkers
text: Product Description Lyman - an innovator in the field of reloading and shooting accessories - has introduced their Cartridge Checkers. These gauge blocks allow reloaders to quickly confirm that their ammunition will fit in their chamber. Made from solid blocks of 6061 T6 aircraft grade aluminum, each of the three orange anodized Cartridge Checkers are precisely machined to SAAMI minimum chamber dimensions and accept the most popular rifle and pistol rounds. Simply drop a loaded round into the clearly marked cartridge hole. If it fits flush with the top of the gauge, the round will chamber. Checkers are available in three designs covering most common handgun and rifle calibers. Handgun gauge: 380 Auto, 9mm Luger, 38 Super, 40 S&W, 45 ACP, 38/357, 44 Mag/Spl, and 45 Colt Small Rifle gauge: 204 Ruger, 22 Hornet, 223 Rem, 22-250, 300 AAC Blackout and 7.62x39mm Large Rifle gauge: 243 Win, 270 Win, 30-30 Win, 308 Win, 30-06 and 300 WSM. Product Description Lyman - an innovator in the field of reloading and shooting accessories - has introduced their Cartridge Checkers. These gauge blocks allow reloaders to quickly confirm that their ammunition will fit in their chamber. Made from solid blocks of 6061 T6 aircraft grade aluminum, each of the three orange anodized Cartridge Checkers are precisely machined to SAAMI minimum chamber dimensions and accept the most popular rifle and pistol rounds. Simply drop a loaded round into the clearly marked cartridge hole. If it fits flush with the top of the gauge, the round will chamber. Checkers are available in three designs covering most common handgun and rifle calibers. Handgun gauge: 380 Auto, 9mm Luger, 38 Super, 40 S&W, 45 ACP, 38/357, 44 Mag/Spl, and 45 Colt Small Rifle gauge: 204 Ruger, 22 Hornet, 223 Rem, 22-250, 300 AAC Blackout and 7.62x39mm Large Rifle gauge: 243 Win, 270 Win, 30-30 Win, 308 Win, 30-06 and 300 WSM.From the manufacturer Easy to Use These Ammo Checkers are gauges that allow a reloader to quickly confirm that their ammunition will fit in their chamber. Machined from solid blocks of 6061 T6 aircraft grade aluminum and cut with custom tooling to SAAMI minimum chamber dimensions. Just drop your loaded rounds in the ammo checker, and if the round fits into the gauge, it will fit in the gun's chamber. Each caliber is clearly engraved on the gauge. Bright orange anodizing makes them easy to find on your reloading bench. For quality and accuracy Lyman's Ammo Checkers check the quality and consistency of both reloaded rounds and purchased ammunition. A must for any auto shooter for easy and consistent feed. You can't afford misfeeds, so get the easiest "no-go" gauge available today! Read more About Us "Brands That Perform" means something here at Lyman. Performance means more than just getting the job done. It means delivering value while advancing technology. Most important it means listening to the needs of shooters. In fact, the development of our products is most often directly linked to the feedback we get from our customers and the retailers who supply them. Whether pioneering the use of digital technology in reloading tools or reintroducing "antique" calibers and bullet moulds, Lyman continues to improve and innovate the tools and reloading supplies used by serious shooters and reloaders. 

title: Forster Products NATO Chamber Headspace Gage, Rimless, Hardened Steel, Precision Ground
text: From the brand Straight shooters since 1935. Our story How we got our start Forster Products has a long history of excellence, beginning in the Forster brothers’ basement with model airplane engines. Today, we are a top supplier of quality Reloading and Gunsmithing Tools designed to expand the capabilities and improve the performance of reloading and shooting enthusiasts. What makes our product unique Our products have been made in rural America for over 80 years by people who care about your shooting success, informed by customer feedback and collaboration with our advisory panel of ProStaff, whose input helps us improve upon and develop the products that you need for the sport you love. Why we love what we do We’re passionate about precision and sport. We know that the control of key variables means the difference between shooting success and failure, and we work hard to ensure that the products we design, make, and sell meet and exceed your own high expectations for excellence. Product Description Forster Headspace Gages The most reliable means to test rifle chamber length Smart gunsmiths and shooters have long selected our headspace gages because each is manufactured from top-quality, hardened steel and precision ground to *American National Standards Institute SAAMI tolerances. When safety and performance are on the line, choose our headspace gages and receive the peace of mind that comes with knowing and understanding how to check your rifle’s headspace. *American National Standards Institute, New York, NY, represents and serves the diverse interests of more than 270,000 companies and organizations and 30 million professionals worldwide by promoting and facilitating voluntary consensus standards and conformity assessment systems, and safeguarding their integrity. All of our headspace gages are: Ground to an exacting ±.00015" headspace tolerance to ensure accurate testing of a rifle’s chamber. Carefully inspected with NIST-certified measurement tools. Made with painstaking care and rigorous manufacturing standards. Read more What is Headspace? According to the Sporting Arms and Ammunition Manufacturers' Institute (SAAMI), which sets product standards for firearms and ammunition, headspace is "the distance from the face of the closed breech of a firearm to the surface in the chamber on which the cartridge case seats." Some shooters are under the misconception that headspace is fixed over the life of the firearm. Headspace can increase after repeated use of ammunition that causes too much pressure. One should routinely check rifle chamber headspace every thousand rounds. Headspace is measured differently depending on whether the firearm’s caliber uses rimmed, belted, or rimless cartridges. Rimmed/Belted and Rimless Cartridges Rimmed and Belted Cartridges Headspace = distance between the bolt face and the top of the rim (chamber face) when the bolt is closed Rimless Cartridge Headspace Headspace = distance between the bolt face and a datum line (determined by SAAMI) where the front of the cartridge rests on its shoulder when the bolt is closed Read more Choosing the Correct Headspace Gage Forster Products offers three lengths of headspace gages per rifle caliber. In order from the shortest to longest, they are GO , NO-GO , and FIELD : 1. GO : Corresponds to the minimum chamber dimensions. If a rifle closes on a GO gage, the chamber will accept ammunition that is made to SAAMI maximum specifications. The GO gage is essential for checking a newly-reamed chamber in order to ensure a tight, accurate, and safe chamber that will accept SAAMI maximum ammo. 2. NO-GO : Corresponds to the maximum headspace we recommend for gunsmiths’ chambering new bolt-action rifles. This is not a SAAMI-maximum measurement. If a rifle closes on a NO-GO gage, it may still be within SAAMI specifications, or it may have excessive headspace. To determine if there is excessive headspace, the chamber should then be checked with a FIELD gage. The NO-GO gage is a valuable tool for gunsmiths’ reaming new chambers, in order to ensure tight and accurate headspace. 3. FIELD : Corresponds to the longest safe headspace. If a rifle closes on a FIELD gage, its chamber is dangerously close to, or longer than, SAAMI-specified maximum chamber size. If chamber headspace is excessive, the gun should be taken out of service until it has been inspected and repaired by a competent gunsmith. FIELD gages are slightly shorter than the SAAMI maximum in order to give a small safety margin. 

title: L.E. Wilson CG-308W Winchester Case Gage
text: Product Description The Cartridge Case Gage was designed with safety in mind and was invented by our founder Sam (L.E.) Wilson in 1935 after a fellow shooter approached him for help in solving a case-separation issue. The gage allows you to see just how much you are sizing back your shoulder on your cases. This is best done by measuring a case in AS-FIRED condition. Take a measurement. Then place back in the gage to see just how much you are sizing the shoulder back. Finally, adjust sizing die accordingly. After sizing your cases, there is a good chance the brass will lengthen. The gage will also check min/max case length and will point out the need for case trimming. This is an essential tool for every reloaded. Compatible calibers: 308 Winchester/7.62 Nato. Product Description The Cartridge Case Gage was designed with safety in mind and was invented by our founder Sam (L.E.) Wilson in 1935 after a fellow shooter approached him for help in solving a case-separation issue. The gage allows you to see just how much you are sizing back your shoulder on your cases. This is best done by measuring a case in AS-FIRED condition. Take a measurement. Then place back in the gage to see just how much you are sizing the shoulder back. Finally, adjust sizing die accordingly. After sizing your cases, there is a good chance the brass will lengthen. The gage will also check min/max case length and will point out the need for case trimming. This is an essential tool for every reloaded. Compatible calibers: 308 Winchester/7.62 Nato.

title: Forster Products Sammi Dimensioned Headspace Gage, Rimless, Hardened Steel, Precision Ground
text: From the brand Straight shooters since 1935. Our story How we got our start Forster Products has a long history of excellence, beginning in the Forster brothers’ basement with model airplane engines. Today, we are a top supplier of quality Reloading and Gunsmithing Tools designed to expand the capabilities and improve the performance of reloading and shooting enthusiasts. What makes our product unique Our products have been made in rural America for over 80 years by people who care about your shooting success, informed by customer feedback and collaboration with our advisory panel of ProStaff, whose input helps us improve upon and develop the products that you need for the sport you love. Why we love what we do We’re passionate about precision and sport. We know that the control of key variables means the difference between shooting success and failure, and we work hard to ensure that the products we design, make, and sell meet and exceed your own high expectations for excellence. Product Description Forster Headspace Gages The most reliable means to test rifle chamber length Smart gunsmiths and shooters have long selected our headspace gages because each is manufactured from top-quality, hardened steel and precision ground to *American National Standards Institute SAAMI tolerances. When safety and performance are on the line, choose our headspace gages and receive the peace of mind that comes with knowing and understanding how to check your rifle’s headspace. *American National Standards Institute, New York, NY, represents and serves the diverse interests of more than 270,000 companies and organizations and 30 million professionals worldwide by promoting and facilitating voluntary consensus standards and conformity assessment systems, and safeguarding their integrity. All of our headspace gages are: Ground to an exacting ±.00015" headspace tolerance to ensure accurate testing of a rifle’s chamber. Carefully inspected with NIST-certified measurement tools. Made with painstaking care and rigorous manufacturing standards. Read more What is Headspace? According to the Sporting Arms and Ammunition Manufacturers' Institute (SAAMI), which sets product standards for firearms and ammunition, headspace is "the distance from the face of the closed breech of a firearm to the surface in the chamber on which the cartridge case seats." Some shooters are under the misconception that headspace is fixed over the life of the firearm. Headspace can increase after repeated use of ammunition that causes too much pressure. One should routinely check rifle chamber headspace every thousand rounds. Headspace is measured differently depending on whether the firearm’s caliber uses rimmed, belted, or rimless cartridges. Rimmed/Belted and Rimless Cartridges Rimmed and Belted Cartridges Headspace = distance between the bolt face and the top of the rim (chamber face) when the bolt is closed Rimless Cartridge Headspace Headspace = distance between the bolt face and a datum line (determined by SAAMI) where the front of the cartridge rests on its shoulder when the bolt is closed Read more Choosing the Correct Headspace Gage Forster Products offers three lengths of headspace gages per rifle caliber. In order from the shortest to longest, they are GO , NO-GO , and FIELD : 1. GO : Corresponds to the minimum chamber dimensions. If a rifle closes on a GO gage, the chamber will accept ammunition that is made to SAAMI maximum specifications. The GO gage is essential for checking a newly-reamed chamber in order to ensure a tight, accurate, and safe chamber that will accept SAAMI maximum ammo. 2. NO-GO : Corresponds to the maximum headspace we recommend for gunsmiths’ chambering new bolt-action rifles. This is not a SAAMI-maximum measurement. If a rifle closes on a NO-GO gage, it may still be within SAAMI specifications, or it may have excessive headspace. To determine if there is excessive headspace, the chamber should then be checked with a FIELD gage. The NO-GO gage is a valuable tool for gunsmiths’ reaming new chambers, in order to ensure tight and accurate headspace. 3. FIELD : Corresponds to the longest safe headspace. If a rifle closes on a FIELD gage, its chamber is dangerously close to, or longer than, SAAMI-specified maximum chamber size. If chamber headspace is excessive, the gun should be taken out of service until it has been inspected and repaired by a competent gunsmith. FIELD gages are slightly shorter than the SAAMI maximum in order to give a small safety margin. 

title: Lyman 7832323 Reloading 223 Case Length/Headspace Gauge, Gray
text: Product Description To achieve the highest degree of safety and accuracy, Lyman recommends that all bottleneck rifle cases be inspected after resizing to ensure that the proper headspace dimension is maintained. The best way to check this critical dimension is with a Lyman case length/headspace gauge. The reloader simply inserts the case into the gauge to insure that it does not exceed the maximum or fall below the minimum allowable headspace. In addition, the gauge will identify a case which exceeds the maximum allowable case length. Caution: Any case found with excessive headspace should be destroyed immediately. Lyman’s Rifle Case Length Headspace Gauges will eliminate the guesswork with rifle reloading. Product Description To achieve the highest degree of safety and accuracy, Lyman recommends that all bottleneck rifle cases be inspected after resizing to ensure that the proper headspace dimension is maintained. The best way to check this critical dimension is with a Lyman case length/headspace gauge. The reloader simply inserts the case into the gauge to insure that it does not exceed the maximum or fall below the minimum allowable headspace. In addition, the gauge will identify a case which exceeds the maximum allowable case length. Caution: Any case found with excessive headspace should be destroyed immediately. Lyman’s Rifle Case Length Headspace Gauges will eliminate the guesswork with rifle reloading.From the manufacturer Achieve the highest degree of safety and accuracy Lyman recommends that all bottleneck rifle cases be inspected after resizing to ensure that the proper headspace dimension is maintained. The best way to check this critical dimension is with a Lyman case length/headspace gauge. The reloader simply inserts the case into the gauge to insure that it does not exceed the maximum or fall below the minimum allowable headspace. In addition, the gauge will identify a case which exceeds the maximum allowable case length. Caution: Any case found with excessive headspace should be destroyed immediately. Lyman’s Rifle Case Length Headspace Gauges will eliminate the guesswork with rifle reloading. Read more About Us "Brands That Perform" means something here at Lyman. Performance means more than just getting the job done. It means delivering value while advancing technology. Most important it means listening to the needs of shooters. In fact, the development of our products is most often directly linked to the feedback we get from our customers and the retailers who supply them. Whether pioneering the use of digital technology in reloading tools or reintroducing "antique" calibers and bullet moulds, Lyman continues to improve and innovate the tools and reloading supplies used by serious shooters and reloaders. Read more 

title: Vermont Gage 951020200 Hex Reversible Handle, Go/No Go, Aluminum
text: Product Description Aluminum handles, light Blue (inch) yellow (metric), red collet for no go end, green collet for go end. Product Description Aluminum handles, light Blue (inch) yellow (metric), red collet for no go end, green collet for go end.

title: 308 Winchester Headspace Gauge Set GO and NO-GO
text: Product Description Every gunsmith knows that proper use of a headspace gage is the most reliable way to test the length of a rifle chamber. “Headspace” is the distance between the face of the breech and the base of the cartridge when the action is closed, and excessive headspace can be dangerous as well as impair accuracy. For instance, unsupported brass fired in a rifle action with excessive headspace can rupture, allowing gas to blow rearward like rocket exhaust. Because your safety is on the line, Forster Headspace Gages are made with painstaking care and exacting manufacturing standards to ensure accurate testing of your rifle’s chamber. If a rifle closes on a GO gage, the rifle chamber will accept any ammunition that is made within SAAMI (industry standard) specifications. If a rifle closes on a NOGO gage, the rifle chamber might have excessive headspace. Most gunsmiths chamber a rifle’s headspace between the GO and NOGO dimensions. If a rifle closes on a FIELD gage, the rifle chamber is dangerously close to or already over the SAAMI specified maximum chamber size. Product Description Every gunsmith knows that proper use of a headspace gage is the most reliable way to test the length of a rifle chamber. “Headspace” is the distance between the face of the breech and the base of the cartridge when the action is closed, and excessive headspace can be dangerous as well as impair accuracy. For instance, unsupported brass fired in a rifle action with excessive headspace can rupture, allowing gas to blow rearward like rocket exhaust. Because your safety is on the line, Forster Headspace Gages are made with painstaking care and exacting manufacturing standards to ensure accurate testing of your rifle’s chamber. If a rifle closes on a GO gage, the rifle chamber will accept any ammunition that is made within SAAMI (industry standard) specifications. If a rifle closes on a NOGO gage, the rifle chamber might have excessive headspace. Most gunsmiths chamber a rifle’s headspace between the GO and NOGO dimensions. If a rifle closes on a FIELD gage, the rifle chamber is dangerously close to or already over the SAAMI specified maximum chamber size.