Original sentence: 45-70 Government rounds rather than the higher pressure rounds tolerated by modern lever action rifles such as the Marlin Model 1895.50 Beowulf is a proprietary caliber, its manufacturer controlling the distribution process of its ammunition and components.50 Beowulf remains at best a medium powered cartridge.Alexander Arms uses gas ports adjusted for a pressure of 15,000 PSI, making its ballistics roughly equivalent to those of early.This has resulted in supply bottlenecks.With normal bullet weights between 300 and 400 grains, overall cartridge length shorter than that of an AR-15 magazine well and pressures limited by the AR gas system the