page_title: Rimfire ammunition
section_title: Shot shells
hierarchical_section_title: Rimfire ammunition / Shot shells
caption_attribution_description: Français&#160;: Munitions à percution annulaire 9 mm Grenaille 9 mm Grenaille 22 LR Grenaille 22 LR 22 LR Grenaille 22 LR Bosquette 9 mm Bosquette English: After a discussion with Lax, we came up with the English/American names for the cartridges: 9mm Flobert shot 9mm Flobert shot .22 Long Rifle shot .22 Long Rifle .22 Long Rifle shot .22 CB Short 9mm Flobert BB cap
context_page_description: Rimfire ammunition refers to a type of metallic firearm cartridges. It is called rimfire because the firing pin of a gun strikes and crushes the base's rim to ignite the primer. Invented in 1845, by Louis-Nicolas Flobert, the first rimfire metallic cartridge was the .22 BB Cap cartridge, which consisted of a percussion cap with a bullet attached to the top. While many other different cartridge priming methods have been tried since the 19th century, only rimfire technology and centerfire technology survive today. The rimfire .22 Long Rifle cartridge, introduced in 1887, is by far the most common ammunition in the world today in terms of units sold.
context_section_description: Some .22 caliber rimfire cartridges are loaded with a small amount of #11 or #12 shot (about 1/15th ounce). This "snake shot" is only marginally effective in close ranges, and is usually used for shooting snakes, rats or other small animals. It is also useful for shooting birds inside storage buildings as it will not penetrate walls or ceilings. At a distance of about 10 feet (3 m), which is about the maximum effective range, the pattern is about 8 inches (20 cm) in diameter from a standard rifle. Special smoothbore shotguns, such as the Marlin Model 25MG "Garden Gun" can produce effective patterns out to 15 or 20 yards using .22 WMR shotshells, which hold 1/8 oz. of #11 or #12 shot contained in a plastic capsule.
  Shotshells will not feed reliably in some magazine fed firearms, because of the unusual shape of some cartridges that are crimped closed at the case mouth, and the relatively fragile plastic tips of other designs. Shotshells will not produce sufficient power to cycle semiautomatic actions, because, unlike projectile ammunition, nothing forms to the lands and grooves of the barrel to create the pressure necessary to cycle the firearm's action.
  The 9mm Flobert is a notable rimfire cartridge that is still in production in Europe, and is chambered by the Winchester Model 36 in the 1920s. This cartridge is primarily loaded with a small amount of shot, but can also fire a small ball, and are used in "garden gun", which are miniature shotguns. Its power and range are very limited, making it suitable only for pest control. An example of rare but modern 9 mm Flobert Rimfire among hunters in Europe is the 1.75" Brass Shotshell manufactured by Fiocchi in Lecco, Italy using a .25 oz shot of #8 shot with a velocity of 600 fps.
caption: 9mm Flobert shot, 9mm Flobert shot, .22 Long Rifle shot, .22 Long Rifle, .22 Long Rifle shot, .22 CB Short, and 9mm Flobert BB cap
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