has the same tiny case as the .22 BB cap and the two cartridges are interchangeable. There are now .22 rounds sold as .22 CB Short and .22 CB Long which come in the standard .22 Rimfire cartridge case sizes to allow the rounds to be used in standard magazine-fed firearms which would likely jam with the tiny BB or CB cases. The CCI .22 CB Short and .22 CB Long use the same 29-grain bullet as the regular .22 Short and .22 Long. The CCI CB rounds have muzzle velocities of 720 feet per second (ft/s) for an impact energy of 33 foot/pounds (ft-lb). The standard .22 Short and .22 Long fire the same bullet weight at 1,045 ft/s for 70 ft-lb. The CB rounds are relatively quiet for short range target practice, control of small pests, or use in older .22 guns that might not be safe with modern high pressure rounds. For trapping these CB Short and CB Long rounds in indoor target practice, a standard .22 bullet trap is needed. Other modern CB type rounds, such as the .22 Aguila Colibri and .22 Aguila Super Colibri, have bullets in the same weight range as the original CB cap with velocities in the 300 ft/s to 500 ft/s range using the Long case. Specifications Case length: BB and CB cap: Short: Long: Bullet weight: BB and CB cap typically 18 grains (1.15 g) Short and Long typically 29 grains (1.9 g) Muzzle velocity: BB Cap typically: 780 f/s (240 m/s) CB Cap typically: 853 f/s (260 m/s) Short typically: 900 f/s (275 m/s) Long typically: 1060 f/s (320 m/s) See also .22 BB .22 Short .22 Long .22 Extra Long .22 Long Rifle .22 Magnum .22 Hornet List of rimfire cartridges Literature Barnes, Frank C., ed. by John T. Amber. ".22 CB Cap", in Cartridges of the World, pp. 273, 282, & 283. Northfield, IL: DBI Books, 1972. . References Pistol and rifle cartridges Rimfire cartridges de:Flobert-Waffen sl:Flobert