Maximum Case Length – 2.222 inches
Case Trim Length – 2.212 inches
Primer Type – large rifle
Rim Thickness – .064
Rim Diameter – .540
Case Capacity in Grains (water) – 55.7
SAAMI Maximum Pressure Standard- 45,000 CUP / 49000 PSI
Maximum Cartridge Overall Length is dependant on bullet type/weight.
Military Specification – 3.04 inches
Cartridge Chronology
1. Cartridge, Powder, MK I
Accepted 1889
Blackpowder load. Boxer primed. 215 gr RN bullet.
Muzzle Velocity – 1850fps
2. Cartridge, Cordite, MK I
Accepted 1891
Smokeless powder load. Boxer primed. 215 gr RN bullet.
Muzzle Velocity – 1970fps
3. Cartridge, Cordite, Mk II
Accepted 1893
Smokeless powder load. Berdan primed. 215 gr RN bullet.
Muzzle Velocity – 1970fps
4. Cartridge, Cordite, Mk III
Accepted 1898
Smokeless powder load. Berdan primed. 215 gr HP bullet with cup.
Muzzle Velocity – 1970fps
5. Cartridge, Cordite, Mk IV
Accepted 1898
Smokeless powder load. Berdan primed. 215 gr HP bullet no cup.
Muzzle Velocity – 1970fps
6. Cartridge, Cordite, Mk V
Accepted 1899
Smokeless powder load. Berdan primed. 215 gr HP bullet. Core hardened with 2% antimony.
Muzzle Velocity 1970fps
7. Cartridge, Mk VI
Accepted 1904
Smokeless powder load. Berdan primed. 215 gr RN bullet.
Muzzle Velocity – 2050fps
8. Cartridge, Mk VII
Accepted 1910
Smokeless powder load. Boxer or Berdan primed. 174 gr pointed bullet.
Muzzle Velocity – 2440fps
9. Cartridge, Mk VIII
Accepted 1938
Smokeless powder load. Boxer or Berdan primed. 175 gr pointed-boat tailed bullet.
Muzzle Velocity – 2440fps