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.22 Long Rifle

Common ammunition cartridge / From Wikipedia, the free encyclopedia

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The .22 Long Rifle or simply .22 LR or 22 (metric designation: 5.6×15mmR)[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 rifles, pistols, revolvers, and submachine guns.

Quick facts: .22 Long Rifle (.22 LR), Type, Place&nbs...
.22 Long Rifle (.22 LR)
.22 Long Rifle – subsonic hollow point (left), standard velocity (center), hyper-velocity hollow point (right)
Place of originUnited States
Production history
DesignerJ. Stevens Arms & Tool Company
Parent case.22 Long[1]
Case typeRimmed, straight[1]
Bullet diameter.223 in (5.7 mm) - .2255 in (5.73 mm)[1]
Land diameter.212 in (5.4 mm)
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]
Maximum pressure24,000 psi (170 MPa)
Ballistic performance
Bullet mass/type Velocity Energy
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 in (470 mm)
Source(s): [2][3]

In terms of units sold, it is by far the most common ammunition in the world today. Common uses include hunting and shooting sports. Ammunition produced in .22 Long Rifle is effective at short ranges, has little recoil, and is cheap to purchase. These qualities make it ideal for plinking and marksmanship training.

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