 or SAAMI (Sporting Arms and Ammunition Manufacturers’ Institute) sanctioned maximum pressures.This comparison is not totally objective since the 8mm Remington Magnum and .325 WSM operate at 448.16 MPa (65000 psi), the 8×68mm 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 pressure.Higher chamber pressure results in higher muzzle velocities.