.22 Long Rifle

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Three .22 LR rounds side-by-side
.22 Long Rifle
Production information
Country of origin	United States of America
Designer(s)	J. Stevens Arms & Tool Company
Designed in	1887
Production began	1887
Technical specifications
Cartridge type	Rimmed, straight
Parent cartridge	.22 Long
Overall length	1 in (25.4mm)
Case length	.613 in (15.6mm)
Neck diameter	.226 in (5.7mm)
Base diameter	.226 in (5.7mm)
Rim diameter	.278 in (7.1mm)
Rim thickness	.043 in (1.1mm)
Rifling twist	1:16"
Muzzle velocity	1,200 ft/s (370 m/s) - 1,640 ft/s (500 m/s)
Other information
Other name(s)	.22 LR 5.7×15.6mmR

The .22 Long Rifle (.22 LR for short) is a small-caliber, rimfire pistol and rifle cartridge.

History

Introduced in 1887 by the J. Stevens Arms & Tool Company, the .22 Long Rifle was based on the case of the .22 Long cartridge combined with the 40 grain bullet of the .22 Extra Long cartridge. It originated from the Flobert BB cap of 1845 through the .22 Smith & Wesson cartridge of 1857.

Over the years, it gained popularity for varmint shooting, sports shooting, plinking, inexpensive firearms training, and small game hunting.

External Link(s)

• Wikipedia article