I've always had a concern with cut on contact. Mind you all the deer I have shot have been with chisel tip type broadheads (wasp and muzzy). I know, through experience, that muzzy's bust through ribs, pulverizing them with a direct hit. So what happens when cut on contact hits bone, especially out of a low ke setup? I know deer aren't made of pineboard. But the muzzy's have no problem busting through a 3/8" board while a steelforce or stinger barely clears (actually, the steelforce tends to stop at the locking collar).