22 Short Rimfire Ammunition
.22 Short is a variety of .22 caliber (5.6 mm) rimfire ammunition. Developed in 1857 for the first Smith & Wesson revolver, the .22 rimfire was the first American metallic cartridge. The original loading was a 29 or 30 gr (0.066 or 0.069 oz; 1.879 or 1.944 g) bullet and 4 gr (0.0091 oz; 0.2592 g) of black powder. The original .22 rimfire cartridge was renamed .22 Short with the introduction of the .22 Long in 1871.
