Unlike members of the first generation of center-fire blackpowder revolver cartridges, which were loaded only to 6-8,000 CUP [for use in iron frame pistols], the 44 Russian, a member of the 2nd generation, is loaded to higher pressures (12,000 CUP) for use in steel revolvers. To keep the 44 Russian rounds from being (very destructively) fired in 44 American revolvers, the 44 Russian case is 0.060" longer (0.91" vs 0.97"). The Russian can be fired in 44 Special and 44 Magnum firearms (though long bullet jumps tend to preclude reasonable accuracy)