.12 Cooper

Cartridge Data Published On: January 19, 2015 at 4:23 pm by Bullet-Blog and last updated on February 1, 2015 at 1:22 am


.12 Cooper CCM, .12 Eichelberger CCM, .12-22 Cooper CCM, .12-22 Eichelberger CCM


The .12 Cooper (AKA: .12 Cooper CCM, .12 Eichelberger CCM, .12-22 Cooper CCM, .12-22 Eichelberger CCM) is a Center Fire cartridge with a Bullet Diameter of 0.123 in” (3.12mm) that is primarily used in Rifles. The .12 Cooper originated in The United States in (UNKNOWN DATE). The .12 Cooper also has a case length of 1.106 in” (28.09mm) and an overall length of (UNKNOWN).

Additional Cartridge Designations: Wildcat Cartridge.

Cartridge Details

  • Year:
  • Origin:
  • Cartridge Type:
  • Application:
  • Bullet Diameter:
  • Neck Diameter:
  • Shoulder Diameter:
  • Base Diameter:
  • Rim Diameter:
  • Rim Thickness:
  • Case Length:
  • Primer:
  • 1996
  • The United States
  • Rimmed, Bottleneck
  • Rifles
  • 0.123 in” (3.12mm)
  • 0.145 in” (3.68mm)
  • 0.247 in” (6.27mm)
  • 0.249 in” (6.32mm)
  • 0.308 in” (7.82mm)
  • 0.05 in” (1.27mm)
  • 1.106 in” (28.09mm)
  • Center Fire (Small Pistol)

[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.