Below is a list of Rebated rim cartridges. Rebated cartridges have a rim that is significantly smaller in diameter than the base of the case, serving only for extraction. Functionally the same as a rimless case, the rebated rim allows a gun to be easily converted to fire a larger-than-normal cartridge, as most of a firearm's loading and extraction mechanism, does not need to be altered as long as the rim size is preserved.[1]

Rebated rim cartridges are known to be used on firearms using Advanced Primer Ignition (API blowback) for its operation, notably autocannons such as the 20mm Becker/Oerlikon series.[2] API Blowback firearms have straight-sided chamber walls as possible (and sometimes slightly bottlenecked) to contain the cartridge and allow a deeper chambering.[3] The bolt face has the same diameter as the Rebated rim cartridge as it follows along with the extraction claw into the chambering.[4]

List

Pistol/Carbine/PDW

Rifle

Autocannon

  • 20x70mmRB
  • 20x72mmRB
  • 20×80mmRB
  • 20×101mmRB
  • 20×110mmRB
  • 20×128mmRB
  • 30×90mmRB
  • 30×92mmRB
  • 55×175mmRB

See also

References

  1. ↑
  2. ↑ Williams, Anthony G., Of Oerlikons and other things…… Archived 2014-11-10 at the Wayback Machine www.quarry.nildram.co.uk article
  3. ↑
  4. ↑ Anthony G. Williams, Rapid Fire, Airlife UK 2000, pages 63-68
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