.22 BB

Cartridge Data Published On: December 20, 2014 at 11:36 pm by Bullet-Blog and last updated on February 12, 2015 at 11:24 am


.22 BB Cap, .22 Bullet Breach Cap


The .22 BB (AKA: .22 BB Cap, .22 Bullet Breach Cap) is a Rimfire cartridge with a Bullet Diameter of 0.222 in” (5.64mm) that is primarily used in Pistols. The .22 BB originated in France in 1845. The .22 BB also has a case length of 0.284 in” (7.21mm) and an overall length of 0.343 in” (8.71mm).


The .22 BB, closely related to the more popular .22 CB, is a rimfire pistol and rifle cartridge carries with it very low muzzle energy and low velocities, given its projectile size and cartridge length. Unlike most other rimfire cartridges, the .22 BB pistol cartridge does not have a powder charge inside of its casing, but instead relies on the energy generated by the rimfire primer. Because of this, the .22 BB carries with it very little practical use and is most commonly used for novelty shooting.

Associated Firearms

Joseph Lang BoxLock Hammer Gallery Pistol, Marlin 39A Lever Action, Henry Mini Youth, Savage Rascal Series, Crickett Single-Shot

Cartridge Details

  • Year:
  • Origin:
  • Cartridge Type:
  • Application:
  • Bullet Diameter:
  • Neck Diameter:
  • Shoulder Diameter:
  • Base Diameter:
  • Rim Diameter:
  • Rim Thickness:
  • Case Length:
  • Overall Length:
  • Primer:
  • 1845
  • France
  • Rimmed, Straight
  • Pistols
  • 0.222 in” (5.64mm)
  • 0.224 in” (5.69mm)
  • N/A
  • 0.224 in” (5.69mm)
  • 0.27 in” (6.86mm)
  • 0.04 in” (1.02mm)
  • 0.284 in” (7.21mm)
  • 0.343 in” (8.71mm)
  • Rimfire (Rimfire)

[accordion title=’INCONSISTENT, MISSING or INCORRECT DATA’ open=’false’]INCONSISTENT, MISSING or INCORRECT DATA: If you find information here that you believe to be incorrect or missing please report any findings and references you may have as to what corrections should be made to . Please note your username in the email.

NOTE: This Firearms Cartridge Library is currently in BETA and may not contain complete information or data. The data displayed here by Bullet-Blog is for information use only and should not be used as a reference for reloading live ammunition. When consulting the information on this site or any other information source regarding firearms or ammunition, always compare information against a second or third reference such as a trusted industry authority or reloading manual. Use information here at your own risk.

* Relative to ruler-scaled image above. Size will vary by screen and device used for viewing.