.22 long rifle
| .22 long rifle | ||||||||||||||||||||||||
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 .22 long rifle cartridges. The two .22 Long Rifle cartridges on the left have a standard case length of .613 in (15.6 mm). The .22 Long Rifle on the right has a slightly longer case length of .702 in (17.8 mm) and is a high-velocity .22 Long Rifle "Stinger" cartridge that uses lighter 30–32-grain (1.9–2.1 g) bullets. | ||||||||||||||||||||||||
| Type | Pistol, rifle, revolver | |||||||||||||||||||||||
| Place of origin | United States | |||||||||||||||||||||||
| Production history | ||||||||||||||||||||||||
| Designer | J. Stevens Arms & Tool Company | |||||||||||||||||||||||
| Designed | 1887 | |||||||||||||||||||||||
| Produced | 1887–present | |||||||||||||||||||||||
| Variants | .22 Long Rifle Stinger Aguila .22 Long Rifle Colibrí | |||||||||||||||||||||||
| Specifications | ||||||||||||||||||||||||
| Parent case | .22 long | |||||||||||||||||||||||
| Case type | Rimmed, straight | |||||||||||||||||||||||
| Bullet diameter | .223 in (5.7 mm) – .2255 in (5.73 mm) | |||||||||||||||||||||||
| Land diameter | .212 in (5.4 mm) | |||||||||||||||||||||||
| Neck diameter | .226 in (5.7 mm) | |||||||||||||||||||||||
| Base diameter | .226 in (5.7 mm) | |||||||||||||||||||||||
| Rim diameter | .278 in (7.1 mm) | |||||||||||||||||||||||
| Rim thickness | .043 in (1.1 mm) | |||||||||||||||||||||||
| Case length | .613 in (15.6 mm) | |||||||||||||||||||||||
| Overall length | 1.000 in (25.4 mm) | |||||||||||||||||||||||
| Rifling twist | 1:16" | |||||||||||||||||||||||
| Primer type | Rimfire | |||||||||||||||||||||||
| Maximum pressure | 24,000 psi (170 MPa) | |||||||||||||||||||||||
| Ballistic performance | ||||||||||||||||||||||||
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| Test barrel length: 18.5 in (470 mm) Source: | ||||||||||||||||||||||||
The .22 long rifle (.22LR), also known as the 5.7×15mmR, is a long-established variety of .22 caliber rimfire ammunition originating from the United States. It is used in a wide range of firearms, including rifles, pistols, revolvers, and submachine guns. It is a well-established small-game round but is not typically used for hunting larger game, as it lacks the necessary stopping power.
In terms of quantities sold, the .22 Long Rifle is by far the most common ammunition that is currently manufactured and sold in the world. Common uses include hunting and shooting sports. Ammunition produced in .22 Long Rifle is effective at short ranges, has little recoil, and is inexpensive to purchase, making it ideal for plinking and marksmanship training.