I think that a heavy 45/70 load is far superior to a 12ga slug but there is a few slugs that come higly recomended. One of those is the breneke magnum designed for big game. There is another company from down south somewhere that has a slug, "terminator" or something like that, is supposed to be an excellent big game slug. I'll stick with my guide gun with 405gr kodiak bonded loads.