Working together, Marlin and Hornady Manufacturing have developed a potent 45 caliber belted magnum cartridge that is an upgrade on the classic 45/70 Government. Its 350-grain bullet delivers almost 3,500 foot-pounds of energy at the muzzle and feeds the new Marlin Model 1895M lever rifle. 

This text is based on information from “Cartridges of the World”, Hodgdon reloading manual, the cartridge designer and/or own resources.