The .45/70 has been a long-standing favorite of handloaders who cast and load lead bullets. Bullet casting is the real nitty-gritty of handloading, and in big bores like the .45/70, good cast bullets will equal, and often exceed, the accuracy of jacketed bullets. With strong modern rifles like the Marlin and Ruger, there's no problem loading 400-grain bullets, cast or jacketed, close on to 2,000 feet per second (fps), which is a solid wallop for any game animal that walks this continent. Several years back I did a lot of hunting with a Ruger Number One loaded with bullets I'd cast from linotype, which is a lead alloy hardened with tin and antimony. When recovered from a couple of elk, these hardened bullets were semi-mushroomed after deep penetration. Similar experiences by thousands of other handloaders of cast bullets no doubt have added to a firm belief in the effectiveness of big-bore cartridges. Marlin did cast-bullet shooters a big favor when it abandoned Micro-Groove rifling (which doesn't like cast bullets) in its big-bore rifles and switched to cast-bullet-friendly, wide-groove, cut rifling.