Norma Oryx 7.5x55 180 Grain Brass Cased Rifle Ammo, 20 Rounds, 20174722

Whereas the early versions of this unusual rifle design had a number of undesirable features which severely limited the loads that could be used the latter versions (model 1911) could utilize the full potential of the 75x55 at a pressure of 45.500 psi.