All the deer I have shot with 50 and 54 cal Maxiballs have come home with me. I shoot them over 100 gr loose pyrodex and they shoot accurately within the distance I can use my peep sights. Recently I've been shooting an in-line with 350 gr FPBs and they perform well on deer too. Nice to have a scope to size up a deer, though I don't seem to shoot over 100 yds.

Big, "slow", full-bore bullets have been killing deer for many years. Marketing and profit margins are the real impetus behind most "improvements" in the hunting industry.