.22 Long Rifle

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)
Type	Rifle
Place of origin	United States
Production history
Designer	J. Stevens Arms & Tool Company
Designed	1887
Produced	1887–present
Specifications
Parent case	.22 Long[1]
Case type	Rimmed, 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 length	1.000 in (25.4 mm)[1]
Rifling twist	1:16"[1]
Primer type	Rimfire[1]
Maximum pressure	24,000 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.