 or SAAMI (Sporting Arms and Ammunition Manufacturers’ Institute) sanctioned maximum pressures.This comparison is not totally objective since the 8mm Remington Magnum operates at 460 MPa (66717 psi), the .325 Winchester Short Magnum at 435 MPa (63,091 psi), the 8 × 68 S at 440 MPa (63817 psi), the 8×64mm S at 405 MPa (58740 psi) and the 7.92×57mm Mauser at 390 MPa (56564 psi) maximum chamber piezo pressure.Higher chamber pressure results in higher muzzle velocities.