.22 Long Rifle

.22 Long Rifle (.22 LR)
.22 LR.jpg
.22 Long Rifle – subsonic hollow point (left), standard velocity (center), hyper-velocity "Stinger" hollow point (right)
TypeRimfire cartridge
Place of originUnited States
Production history
DesignerJ. Stevens Arms & Tool Company
Designed1887
Specifications
Parent case.22 Long[1]
Case typeRimmed, straight[1]
Bullet diameter0.223 in (5.7 mm) - 0.2255 in (5.73 mm)[1]
Neck diameter.226 in (5.7 mm)[1]
Base diameter.226 in (5.7 mm)[1]
Rim diameter.278 in (7.1 mm)[1]
Rim thickness.043 in (1.1 mm)[1]
Case length.613 in (15.6 mm)[1]
Overall length1.000 in (25.4 mm)[1]
Rifling twist1:16"[1]
Primer typeRimfire[1]
Ballistic performance
Bullet mass/typeVelocityEnergy
40 gr. (2.6 g) Solid[2]1,200 ft/s (370 m/s)131 ft⋅lbf (178 J)
38 gr. (2.5 g) Copper-plated HP[2]1,260 ft/s (380 m/s)134 ft⋅lbf (182 J)
32 gr. (2.1 g) Copper-plated HP[2]1,430 ft/s (440 m/s)141 ft⋅lbf (191 J)
31 gr. (2.0 g) Copper-plated RN[3]1,750 ft/s (530 m/s)204 ft⋅lbf (277 J)
30 gr. (1.9 g) Copper-plated HP[3]1,640 ft/s (500 m/s)191 ft⋅lbf (259 J)
Test barrel length: 18.5"
Source(s): [2][3]

The .22 Long Rifle or simply .22 LR (metric designation: 5.6×15mmR) is a long-established variety of .22 caliber rimfire ammunition, and in terms of units sold is still by far the most common ammunition in the world today. It is used in a wide range of rifles, pistols, revolvers, smoothbore shotguns (No. 1 bore), and even submachine guns.

History

American firearms manufacturer J. Stevens Arms & Tool Company introduced the .22 Long Rifle cartridge in 1887.[4] The round owes its origin to the .22 BB Cap of 1845 and the .22 Short of 1857. It combined the casing of the .22 Long of 1871 with the 40-grain (2.6 g) bullet of the .22 Extra Long of 1880, giving it a longer overall length, a higher muzzle velocity and superior performance as a hunting and target round, rendering both the .22 Long and .22 Extra Long cartridges obsolete. The .22 LR uses a heeled bullet, which means that the bullet is the same diameter as the case, and has a narrower "heel" portion that fits in the case. It is one of the few cartridges that are accepted by a large variety of rifles and handguns.

Other Languages
беларуская: .22 Long Rifle
беларуская (тарашкевіца)‎: .22 Long Rifle
català: .22 LR
čeština: .22 Long Rifle
dansk: Long rifle
Deutsch: .22 lfB
español: .22 Long Rifle
français: .22 Long Rifle
italiano: .22 Long Rifle
lietuvių: .22 Long Rifle
Nederlands: .22 Long Rifle
русский: .22 Long Rifle
slovenčina: .22 Long Rifle
slovenščina: .22 LR
suomi: .22 LR
Türkçe: .22LR
українська: .22 Long Rifle
中文: .22 LR