.22 Long
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Not to be confused with the more common .22 Long Rifle.
| .22 Long | ||
|---|---|---|
 | ||
| Type | Rimfire | |
| Place of origin |  USA | |
| Production history | ||
| Produced | 1871 | |
| Specifications | ||
| Parent case | .22 Short | |
| Bullet diameter | .223 in (5.7 mm) | |
| Neck diameter | .224 in (5.7 mm) | |
| Base diameter | .225 in (5.7 mm) | |
| Rim diameter | .272 in (6.9 mm) | |
| Rim thickness | .042 in (1.1 mm) | |
| Case length | .595 in (15.1 mm) | |
| Overall length | .798 in (20.3 mm) | |
| Primer type | Rimfire | |
| Ballistic performance | ||
| Bullet weight/type | Velocity | Energy |
| 29 gr (1.9 g) RN | 1,038 ft/s (316 m/s) | 67 ft·lbf (91 J) |
| Source(s): Cartridges of the World [1] | ||
In 1887 the .22 Long case was combined with the heavier 40 grain (2.6 g) bullet of the .22 Extra Long of 1880 to produce the .22 Long Rifle giving a longer overall length, a higher muzzle energy and superior performance as a hunting and target round, rendering the .22 Long and .22 Extra Long obsolete. For a time there was a price difference between the .22 Long and .22 Long Rifle and the .22 Long held on with budget minded shooters until the price advantage finally disappeared. No new firearms are designed specifically to use .22 Long and the largest 3 producers of .22 Long ammunition ceased production (although it continues to be made by CCI, Aguila, and others). Many .22 Long Rifle guns will chamber and fire the shorter round, though the .22 Long generally does not generate sufficient energy to operate semi-automatic guns. The one prominent survivor of the .22 Long is the .22 CB Long, a long-cased version of the .22 CB.
While the original .22 Long loading used the same powder charge as the .22 Long Rifle, the .22 Long bullet was significantly lighter, and the combination did not result in higher velocities for the .22 Long when fired from a rifle. The large barrel volume to chamber volume ratio of a .22 rimfire rifle means that the powder gasses have expanded as far as they can well before the bullet reaches the muzzle of a normal length rifle barrel, and the light .22 Long bullet has less inertia than the .22 Long Rifle. This means that the .22 Long bullet (and to a lesser extent the .22 Long Rifle in most loadings) actually slows down significantly before it exits the barrel.
Since the .22 Long Rifle performs as well in a short handgun barrel as the .22 Long and outperforms it significantly in a long rifle barrel, the development of the .22 Long Rifle assured the .22 Long's path to obsolescence.
In a sense, though, descendants of the .22 Long still live on, though they are not sold as such. Modern Hypervelocity loadings of the .22 Long Rifle use bullets as light as 30 grains (1.9 g), and special blends of powder to make full use of a rifle barrel to generate velocities far higher than normal loads, and chamber pressures high enough to cycle semi-automatic firearms reliably. The most well known of these is the CCI Stinger, which actually goes so far as to stretch the case length slightly, so that with the short, light bullet, the overall length is still within the max overall length for the .22 Long Rifle.
Specifications
- Length:
- Case: 0.595 in (15.1 mm)
- Overall: 0.880 in (22.4 mm)
- Bullet weight: 29 gr (1.88 g)
References
- ^ a b Cartridges of the World 11th Edition, Book by Frank C. Barnes, Edited by Stan Skinner, Gun Digest Books, 2006, ISBN 0-89689-297-2 pp. 490, 492
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