Talk:Caliber

message: The first sentence:
...diameter of the barrel in relation to the diameter of the projectile...
makes it sound like caliber is a ratio or difference between two diameters.  But it's really an absolute number.  Would it be more correct to say:
...diameter of the barrel or the projectile...
 im here to tell u dat is not correct  — Preceding unsigned comment added by 207.98.173.144 (talk) 14:10, 17 September 2013 (UTC)
thread_title:  What "relationship"? 

message: Folks, why all the refs to "calibre" are now replaced with "caliber"? Does it mean that americal english (Mein Gott! I found this sequence of words real fun!) is now the language standard for the whole world? /BTW, the xUSSR was using british english as educational standard.../ --jno 07:53, 19 June 2006 (UTC)
replies: text: Its for consistency within the article. If an article starts off with US English spelling then it is the done thing to stick with that no matter what the author's natural usage is assuming that the article is not of itself naturall BE or AE - see the MoS for more details GraemeLeggett 08:40, 19 June 2006 (UTC)
replies: text: I mean another articles, like 7.62 mm caliber. --jno 11:23, 19 June 2006 (UTC)
thread_title:  US vs British 

message: The article says that the decimal point is ignored when someone says it, so that a 0.22 inch barrel is called "twenty two calibre". What do you call a cannon with a 22 inch barrel? I don't think this stupid suggestion of ignoring the decimal point should be included in an encyclopaedia. Whoever wrote it has a severe lack of common sense and they were wrong to say that the decimal point "is" ignored, since it is really just a suggestion.
Huey45 03:39, 5 August 2007 (UTC)
replies: text: Well I've never heard anyone anywhere ever call a 22 caliber a .22 caliber. It's just not what's done.  By the way, a gun with a 22 inch diameter barrel would NOT be a 22 caliber, it'd be a 22 inch gun. It's not correct to say "1 caliber = 1 inch". Arthurrh 04:10, 5 August 2007 (UTC)
replies: text:  Saying "Point Twenty-Two" is considered to be a very n00b-like thing to do amongst every shooter I've ever spoken to; it's what people who are new to shooting (or learnt everything from books without any real practical experience) say. You'll notice knowledgeable shooters don't refer to a "Point Thirty-Oh Six" or a "Point Three-Oh-Three" or a "Point Two Two Three"- the "point" is only spoken when it's referring to a decimal calibre, such as "Seven Point Six Two by Fifty-One NATO", "Five Point Five Six", "Six Point Five by Fifty-Five Swedish", and so on. --Commander Zulu 10:53, 5 August 2007 (UTC)
replies: text: In the UK a .22 calibre round is called a two-two, a .410 shotgun cartridge a four-ten, and a .303 a three-oh-three. Metric ammunition is usually the same, e.g., 7.62mm a seven-point-six-two. Confusingly, what the US calls a 12 Gauge is referred-to as a twelve-bore. For airguns a .177 is just a one-seven-seven.  Generally, if you hear someone in the UK using the US terms you know that their knowledge of firearms is confined to what they've heard in American cop shows on the TV.  —Preceding unsigned comment added by 213.40.249.112 (talk) 21:27, 16 May 2009 (UTC)
replies: text:  I notice that the "twenty two calibre" has been replaced with "two two calibre". I have never heard this notation. In Australia we say "twenty two calibre". We also say "three-oh-three" though so maybe it's a mix. 118.208.173.213 (talk) 05:07, 13 June 2009 (UTC)
replies: text: Neither have I; at least not from anyone who actually shoots. Perhaps it should be changed back? Commander Zulu (talk) 05:24, 13 June 2009 (UTC)

text: Speaking the decimal in an inch caliber as "point" just isn't done in the US, unless you are into handloading your own ammo and are trying to order bullets over the phone - from Maine :).  From comments here appearing to originate in Commonwealth countries, it seems that they do not speak the "point" designation either.  To complicate matters further, many people in Southern and Western US States speak metric calibers without the decimal, e.g. "seven six two" is a common slang term for 7.62x51mm NATO, and "five five six" is common for 5.56x45mm NATO.  This is catching on in many other places as the web brings video and the spoken word to the world, not to mention worldwide TV syndication of US cop shows ;).  Also the US in general uses the processional(?) names when speaking a caliber, such as "twenty two, thirty eight, forty five" versus "two two, three eight, four five".  There are exceptions here too, such as the oddly intermixed, yet popular phrase "three fifty seven" for the .357 Magnum caliber. 173.71.141.120 (talk) 18:46, 1 January 2010 (UTC)
thread_title:  "Decimal is dropped when spoken" 

message: QUESTION:  The first sentence of the section titled "Firearms" refers to "the radius of the bullet used."  Throughout the article, caliber refers to a diameter, of the barrel or the projectile.  Which is it?  It seems to me that the radius is not used/  —Preceding unsigned comment added by 63.145.150.3 (talk) 15:35, 17 November 2008 (UTC)
replies: text: It is the diameter, and I have fixed that sentence.  scot (talk) 15:43, 17 November 2008 (UTC)
thread_title: Radius?

message: Could someone add information on 14.5mm Heavy Machine Gun and sniper rounds?  —Preceding unsigned comment added by 144.131.35.209 (talk) 03:07, 28 December 2008 (UTC)
replies: text: The article is about the definition of calibre and includes a list of "some" rounds with conversions. The list could probably be trimmed further. GraemeLeggett (talk) 08:42, 22 July 2010 (UTC)
thread_title:  Missing 

message: Which is correct, Caliber .22 or .22 caliber? --THE FOUNDERS INTENT PRAISE 19:53, 21 January 2009 (UTC)
replies: text: ".22 caliber" is by far the more common usage, although I have seen the form "caliber .22" used, primarily from British sources as I recall.  scot (talk) 21:10, 21 January 2009 (UTC)
thread_title: Grammatical position

message: Someone needs to look up a specific and authorative reference for the meaning of the word "calibre" in American naval language. It is also justified as being the worldwide standard in the English language, because ever since about 1 January 1943, the U.S. Navy has been continuously the world's largest and best-armed one.
In the massive work, "History of United States Naval Operations in World War II" by lead author Samuel Eliot Morison and his team of researchers and other colleagues, Morison clearly explains what "calibre" means on warships. It is the length-to-bore ratio of a naval gun. To give you a couple of examples, a 5-inch 54-calibre naval gun has a barrel (5" x 54) = 270 inches long, which is 22 feet and six inches long. This type of weapon has been used on a large number of American and foreign warships, including destroyers, guided-missile cruisers, nuclear-powered cruisers, and amphibious warefare ships. The prominent ones in U.S. Navy service now are a large number of USS Arleigh Burke-class guided-missile destroyers - the older ones - and the USS Ticonderoga-class guided-missile cruisers, as their gun armament, with one of these on each destroyer and two on each cruiser.
Another example is with the single naval gun that is mounted on 25+ of the newer USS Arleigh Burke-class destroyers, which is a 5-inch 62-calibre naval gun. It has a barrel (5" x 62) = 310 inches long, which is 25 feet and ten inches long.
I think that the present article on "caliber" is impossibly confusing between the words "caliber" and "calibre". There needs to be a separate article on the calibre as defined for naval guns. [I have even seen such absurdities in other Wikipedia articles as such a piece of naval artillery being described as 5-inch (62 mm). I am not joking!] 
Furthermore, some people here have complained about weapons ammunitions with diameters of a strange assortment of nice, round numbers in the metric system, and strange numbers that are actually conversions from the American / British system of units. Well, what they are neglecting to observed that a certain set of standard ammunition diameters was chosen as NATO standards so that one large inventory of ammunition could be used by e.g. 15 different countries. Also, the U.S. Army and Marine Corps has long used a lot of standard metric system diameters for their weapons, and beginning during WW II, the U.S. Navy adopted a lot of metric sizes, also. When the U.S. Air Force became a separate service in late 1947, it soon began to adopt more and more metric system-sized ammunitions.
The NATO & U.S. Army standard ammunition diamters included 20 mm, 25 mm, 30 mm, 40 mm, 75 mm, 81 mm (mortar rounds), 90 mm, 105 mm, 120 mm, 155 mm, and 175 mm, plus just the standard 9.0 mm pistol round that they U.S. Armed Forces were rather slow to adopt. 
Furthermore, based on American weapons in American units, there came the 5.56 mm rifle ammunition, based on the American M-16 rifle which originally fired a bullet of about .223 caliber; also the 7.62 mm bullet, which corresponds to about .30 caliber; and a big six-inch artillery piece that corresponds to something like 203 mm - they used to be in West Germany to threaten to fire nuclear shells, and thank God it never, ever came down to that; 
and the 12.7 mm machine gun bullet, which is based on the celebrated American M-60 .50 caliber machine gun. The .50 caliber machine gun has been in American service for a long, long time, and it traces its roots to a Browning .50 caliber machine gun - one that I believe was designed by an Englishman, but which first went into large-scale production production in the United States. Besides its massive service with the American infantry, armor, and Marine Corps during WW II, the .50 caliber machine gun went into huge service with the Air Services of the U.S. Army, Navy, and Marine Corps during WW II. Let me name some of the warplanes that carried between four and ten of these machine guns during WW II: B-17 "Flying Fortress", B-24 "Liberator", B-25 "Mitchell", B-26 "Marauder", B-29 "Superfortress", F4F "Wildcat", F6F "Hellcat", P-38 "Lightning", P-40 "Warhawk", "P-47" Thunderbolt (eight of them one one fighter plane!), P-51 "Mustang", PB4Y "Privateer" (the Navy's version of the Liberator, used by the thousands). Then along came the Korean War, and jets, and there were the .50 caliber machine gun armed F-80 "Shooting Star" and the great F-86 "Sabre" (six .50 caliber machine guns on most models) 
Also, during WW II, the Navy bought licences to manufacture 20 mm anti-aircraft guns from the Swiss, and 40 mm anti-aircrft guns from the Swedes. American factories made these by the tens of thousands - and I hope that the Swiss and Swedes were paid well - because they were superb anti-aircraft defensive weapons for ships of all kinds. Also, besides their four machine guns, all P-38s got one 20 mm rapid-fire cannon, and I believe that most Navy/Marine F-4U Corsairs had six of these 20 mm cannons. The B-29s also carried several of them. There was a model of the F-86 that had four of them, rather than machine guns.
In any case, the air warriors were moving into larger, harder-hitting weapons during the Cold War, and either the 20 mm cannon or the incredible 20 mm Gatling gun became very widespread. (They cut up enemy warplanes like chainsaws.) I'll name some widely-produced American warplanes of the jet age that have carried 20 mm guns: F-100, F-101, F-104, F-105, F-111, F-4 "Phantom II" (most of them that were produced - and also carried in external pods - and flown by the Navy, Marines, and Air Force), F-8U, F-14, F-15, F-18, F-22, A-7 "Corsair II" (flown by the Navy, Marines, and Air Force), B-52, B-57, and AC-130. I'll let you hunt for more, if interested. So, those who claim that Americans don't make and use metric ammunition and guns are somewhat cockeyed. The A-10 "Thunderbolt II" "tank buster" was built around a huge 30 mm rapid-fire anti-tank gun, and the British-designed, but American-modified AV-8B "Harrier" carries regular 30 mm rapid-fire cannon. (I was working at McDonnell Douglas when a completely-different division was developing the AV-8B from the British AV-8A. Among other things, the AV-8B got a completely-new set of wings, made with the brand-new carbon-composite materials. They are larger for more lift, but weigh less, which you always want for an airplane. Besides being flown by our Marines, the Spanish Navy and the Italian Navy have them, too. Did we sell any back to the British? I don't know.) 
As for the AC-130 "Specter", besides its 20 mm cannon, it has some 40 mm cannon, plus a 105 mm howitzer that fires right out the airplane's tail door. It's not nice to mess with an AC-130.98.81.2.95 (talk) 07:20, 2 December 2009 (UTC)
replies: text: 1. 203mm is a 8 inch howitzer, not 6 inches. These cannons left the US inventory in the 90s. 2. F4U Corsairs never had 6 x 20mm cannons. They either had 6 x .50 cal M2s or 4 x 20mm (later variants). 3. The 30mm GAU-8 in the A-10 is a Gatling-type weapon, just like it's counterparts in other aircraft (20mm in the fighters) the M61 Vulcan, and the 7.62x51 GE M134 "Minigun" used on ground, waterborne and often helicopters.Caisson 06 (talk) 03:28, 9 October 2013 (UTC)
replies: text:  A) The "American M-60" machine gun you refer to is chambered in the standard 7.62x54 NATO caliber, not .50 caliber as you state.  You are thinking of the M-2 and it's heavy barreled brother the M-2HB, also known in American military parlance as the "Ma Duce".  The M-2 is chambered in the .50 Browning Machine Gun (or .50 BMG for short) caliber.  B) John Moses Browning was a United States born firearms designer and genius in firearms engineering who invented many of the innovations you still see today on modern rifles, pistols, and shotguns.  He was *not* an Englishman. 173.71.141.120 (talk) 19:14, 1 January 2010 (UTC)
replies: text: NATO standard is 7.62 x 51mm. 7.62 x 54 is the old Russian rimmed round used on everything from old Nagants to SVD (Dragunov) sniper rifles.Caisson 06 (talk) 03:28, 9 October 2013 (UTC)
thread_title:  Naval guns and Calibres 

message: Caliber seems to suffer from trying to be a dictionary definition, dabbling in many meanings, as well as covering multiple bona fide encyclopedia subjects.  At the least, I think the artillery subject should be split off from the firearms subject.  I may undertake to do this, if I'm up for it.  Thoughts? ENeville (talk) 16:19, 10 February 2010 (UTC)
replies: text: I think it's a good idea. Firearms and artillery weapons are completely different weapon systems so I think it would be wise to split the caliber article into two articles, one dedicated for the definition for firearms and one for artillery. It can help avoid confusion on articles like 5"/38 caliber gun. I had to carefully look at the caliber article twice to assure the correctness of information in the gun article.--Fogeltje (talk) 23:00, 10 February 2010 (UTC)
thread_title:  Multiple subjects, splitting 

message: The first sentence as it currently reads is this:
:In guns including firearms, caliber or calibre is the approximate internal diameter of the barrel in relation to the diameter of the projectile used in it.
This is in error.  The quantifier is that of a diametric measurement.  Not of a diameter in relation to another diameter.  Unless you intend to say that Caliber is itself a relationship of two diameters (it is not), then this needs to rewritten.  If caliber has multiple meanings (say bullet vs. casing vs. barrel diameters), then say so.  But it is NOT something "in relation" to something else.
Tgm1024 (talk) 03:14, 31 December 2011 (UTC)
thread_title:  A problem in the very first sentence.  "...in relation..." (HUH???) 

message: May be a silly question, but I don't see the .44 magnum in this page. and there is no .44 diameter line in the table. Is this intentional?
:Not silly, but there is simply no need or room to include an exhaustive list of every caliber in existence. Jason Kilgore 20:41, 5 January 2015 (UTC)
replies: text: I went ahead and added it. Ghostofnemo (talk) 07:24, 6 January 2015 (UTC)
replies: text: The correct name of .44 Remington Magnum.  It's a large handgun/rifle caliber with a bullet diameter of .429"  At one time there was also a .44 Automag caliber (now defunct).  The .44 Rem Mag is the same bullet diameter as .44 Special.  In the movie "Magnum Force" Clint Eastwood talks about his Smith & Wesson Model 29 when says "I shoot a light special load."  This refers to the fact that .44 Rem Mag is compatible with .44 Special.  Many owners of .44 Rem Mag shoot the Special load instead of the Magnum load because the Magnum is VERY unplesant to shoot.  The Model 29 in .44 Magnum was the second handgun I purchased.Digitallymade (talk) 13:46, 7 July 2016 (UTC)
thread_title:  .44 Magnum ? 

message: Is there an article which gives the clear statement that ? I can see that the situation is complex (and in some contexts, "caliber" can refer to length/bore), but surely the definition should be stated somewhere? I am wondering what should be done with Calibre (unit), a new article at AfD. Should it be a redirect to here? Clearly this article is about guns, but since its title is "caliber" it should cover basic encyclopedic information, such as its definition. Johnuniq (talk) 10:06, 21 December 2014 (UTC)
replies: text: Expanded definition in lead to address your concern - "usually shown millimeters, or in hundredths or thousandths of an inch. When expressed in inches in writing or print, it is shown in terms of a decimal fraction: .45 caliber, for example." Ghostofnemo (talk) 07:31, 6 January 2015 (UTC)
replies: text: Except when it isn't? eg "Rifle, Anti-Tank, .55in, Boys". GraemeLeggett (talk) 12:07, 6 January 2015 (UTC)
replies: text: It isn't necessary. Calibers are expressed in inches, usually to three decimal places and milli meters, usually to two decimal places. it is a physical measure except for the use of the word caliber for artillery where it is the ratio of barrel length to shell diameter.  The Iowa class battleships have 16" 50 caliber guns.  The next class of guns (one is at Fort Dahlgren) were 18" 46 caliber.Digitallymade (talk) 01:50, 15 July 2016 (UTC)
thread_title:  Caliber as a unit 

message: *http://www.militaryfactory.com/armor/detail.asp?armor_id=568
Digitallymade (talk) 14:36, 7 July 2016 (UTC)
thread_title:  External Links 

message: This page is not about caliber it's about Cartridges.  There already is a cartridge page. The top heading of this page can be retained, but all the rest of the data should either be merged or deleted as redundant.  — Preceding unsigned comment added by Digitallymade (talk • contribs) 23:58, 13 July 2016 (UTC)
thread_title:  This page should be merged with Cartridges Suggestion 

message: The table in this section duplicates the volume value for both the 2 pdr and 3 pdr shots. This cannot be right. The rest of the table seems correct, though I cannot find the orignal source. I believe the correct value for the 2 pdr shot is 115.37 cm3, though someone should check me on that. 
This table is very similar to a table on page 6 of A Treatise on Artillery by John Muller, 1768, which is a free resource on Google books. I would replace the current table with the Muller table if I was better at generating tables. Besides having a readily available citation, the Muller reference also describes exactly how he generated it.blacksheep (talk) 19:39, 6 December 2017 (UTC)
thread_title:  Duplicate Entry in Table Under "Pounds as a measure of cannon bore" 

message: Why aren't airgun (.177 and .22) calibers not listed, as well as paintball (.68 and .43) calibers?  Caliber doesn't pertain only to firearms.  — Preceding unsigned comment added by DraakUSA (talk • contribs) 03:11, 30 November 2018 (UTC)
replies: text: paintball and air rifles/pistols are classified as firearms in Australia and probably should be included here. 8==8 Boneso (gnaw) 00:18, 12 February 2019 (UTC)
thread_title:  AirGun and Paintball Calibers 

message: "...the .303 British, named for the bird diameter across the lands, actually uses a .311-in bullet..."
Bird diameter is... what? A misspelling for "bore"? Or is "bird diameter" a thing? And if so, what thing? A Web search didn't turn anything up (except for a few very fat pigeons).  — Preceding unsigned comment added by 92.232.224.153 (talk) 09:40, 23 January 2019 (UTC)
replies: text: I think you are correct that it is either a miss spelling or an autocorrected typo. I checked the reference and it does not support what is asserted in that sentence.  I will look for another source & remove the sentence if I can't find one.  What the editor asserts is correct about the various ways that calibre is measured.    8==8 Boneso (gnaw) 22:04, 23 April 2019 (UTC)
thread_title:  My ignorance, or someone else's? 

message: The unit or designation of measure is Caliber.  Caliber is a unit "based" on inches and/or millimeter (mm).  When using the designation of caliber it is not represented directly as a measurement of inches.  Refer to the definition of caliber.  Caliber is expressed in hundredths or thousands of an inch depending on the number of digits.  When referring to cartridges, bullets or chambers the units or designation used is caliber.  This would be expressed without any leading decimal.  Example: 22 LR is the 22 caliber Long Rifle cartridge.  It may be approximately 0.22 inches in diameter; however, the Caliber is 22.  
Leaving the decimal out of imperial specifications is intentional.   It is not common language to say "Point 22 LR"  or "Dot 22 LR", the common phrase is "Twenty Two LR".   It is also easy to miss read or not see markings with a leading dot, thus another reason the unit of caliber is used. 
This page is for specifications in caliber, This is what is used in the industry.  Expressing it incorrectly as for example .45 caliber would translate a measurement in inches of 0.45/100 equaling 0.0045 inches.    Another example .223 Rem.  If this is a caliber unit it would translate to 0.223 thousandths (0.223/1000), which would equate to 0.000223 inches.   for empirical units caliber designation never has a decimal place.  Metric calibers are also often but not exclusively written and used without a decimal (i.e. Caliber 762).
The title of these pages should be updated as well as the content to avoid confusion for people learning or understanding the correct terms. 
Further information on the correct way to specify values and units.  Values and the units used are separated by a space.  Example 7 mm is correct,  7mm is not correct.  Correct case of letters (upper, lower)  is also important, mm = millimeters, MM who knows that that would be.  Another example (5.56 x 45 mm).  Both 5.46 and 45 are in mm (millimeters), note the spacing around the x and between the number (value) and the units (mm).
216.160.0.104 (talk) 21:05, 2 May 2022 (UTC)
thread_title:  Correct Caliber Designation 

message: Please add it!
And for those "it's irrelevant, too long, too exhausting, too big, too .... THIS is Wikipedia!!! --- 19:21, 22 June 2023 (UTC)
thread_title:  German caliber table is way more informative