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A .22 CB cap, .22 CB short, and .22 Long Rifle Type rimfire, target Place of origin USA colspan="3" style="background: lightsteelblue; text-align: center; vertical-align: middle;"

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| Production history Produced 1888 colspan="3" style="background: lightsteelblue; text-align: center; vertical-align: middle;"

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| Specifications Parent case .22 BB Bullet diameter .222 in (Expression error: Unexpected < operator.

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Base diameter .225 in (Expression error: Unexpected < operator.

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Rim diameter .271 in (Expression error: Unexpected < operator.

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Case length .420 in (Expression error: Unexpected < operator.

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Overall length .520 in (Expression error: Unexpected < operator.

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Source: Cartridges of the World, 11th Edition [1]

.22 CB Cap (Conical Ball Cap) is a variety of .22 caliber rimfire ammunition which has a very small propellant charge (usually no gunpowder, just the primer), resulting in a low muzzle velocity of between 350 and 700 ft/s (110 to 210 m/s). [2] This is similar to the muzzle velocity produced by a low to mid-power .22 pellet gun, however it should be noted that the bullet from a .22 CB cartridge is significantly heavier than a typical airgun pellet and therefore carries more energy. Due to their low power, CB rounds can be trapped by most pellet gun traps. In longer rifle barrels the CB has a seemingly non-existent, very quiet report due to the lack of residual pressure at the muzzle (see Internal ballistics).

The original .22 CB cartridge has the same case as the .22 BB, but there are now low-power .22 rounds sold as .22 CB Short and .22 CB Long which come in the more common .22 rimfire cartridge cases. The longer cases will allow the rounds to be fired in magazine fed firearms, in which the tiny CB Cap cases would jam. So while having the same length, the modern .22 CB Short and the .22 Short are two different cartridges. The CB has a reduced powder load and is kept (as mentioned above) between 350 and 700 ft/s, while the Short with an increased powder amount launches the same 29gr bullet around and above 1000 ft/s.


Specifications

  • Case length:
    • Cap: 0.284 in (7.2 mm)
    • Short: 0.423 in (10.7 mm)
    • Long: 0.595 in (15.1 mm)
  • Bullet weight:
    • typically 20 to 29 grains (1.30 to 1.88 g)

Categories

Cartridge:handguns

  1. 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
  2. Cartridges of the World 11th Edition, Book by Frank C. Barnes, Edited by Stan Skinner, Gun Digest Books, 2006, ISBN 0-89689-297-2 p. 476
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