Deer hunter as well, who eats the meat. I really don't think the large game rounds are a factor. I think I've shot 5 round in the last 8 years, and there are no edible bits in the chest cavity. The lead bullets mushroom out, but...a non-factor for a deer. 270, 30-06, and 300 mag lead ammunition will liquify the chest cavity, but does not go through it.

Shotgun rounds are a different thing. Here in Minnesota, they eliminated lead for waterfowl hunting -- which is a fair thing to do. I'll shoot many, many more rounds at birds - and cleaning the shot out can be tricky. Best not to be spraying the land and/or lakes with lead bbs.