prm,
Heavy bone is also "brutal" to some big game bullets. I have seen a few reduced to tiny fragments that were very close to powder when they hit the big shoulder joint of game larger than deer.
For years many bullet companies used wet paper to test hunting bullets because the bullets turned into such nice, pretty mushrooms--just as almost any bullet will when placed behind the shoulder in the ribs. But dry paper provides a much more realistic look at what can happen to a bullet that hits heavy bone. And on BIG game that's what we're really interested in.
