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The .22 long rifle, also known as the .22 LR or 5.7×15mmR, [4] [5] is a long-established variety of .22 caliber rimfire ammunition originating from the United States. It is used in a wide range of firearms including rifles , pistols , revolvers , and submachine guns .
The Beretta 21A Bobcat is available chambered for either .22 LR or .25 ACP (6.35 mm) ammunition. It has a simple blowback operation, with a single- and double-action trigger mechanism, and exposed hammer. It has a magazine release button in the left side grip, located between the grip retaining screws.
The .22 LR uses a heeled bullet, which means that the bullet is the same diameter as the case, which has a narrower "heel" portion that fits into the case. It is one of the few cartridges that are manufactured and used in a large variety of rifles and handguns.
While modern firearms are generally referred to by the name of the cartridge the gun is chambered for, they are still categorized together based on bore diameter. [citation needed] For example, a firearm might be described as a "30 caliber rifle", which could accommodate any of a wide range of cartridges using a roughly 0.30 inches (7.6 mm) projectile; or as a "22 rimfire", referring to any ...
The Taylor KO factor multiplies bullet mass (measured in grains) by muzzle velocity (measured in feet per second) by bullet diameter (measured in inches) and then divides the product by 7,000, converting the value from grains to pounds and giving a numerical value from 0 to ~150 for normal hunting cartridges.
The .22 LR and related .22 rimfire cartridges use a heeled bullet, where the external diameter of the case is the same as the diameter of the forward portion of the bullet and where the rearward portion of the bullet, which extends into the case, is necessarily smaller in diameter than the main body of the bullet.
The Walther P22 is a semi-automatic pistol chambered for .22 Long Rifle (5.59 mm Caliber) rimfire ammunition.Manufactured by Carl Walther GmbH Sportwaffen, it was introduced in 2002 and has become very popular among shooting sports.
The Intratec TEC-22 is a semi-automatic handgun chambered in .22 Long Rifle. [1] It was also marketed as the Scorpion and Sport-22. The TEC-22 operates using a straight blow-back action.