I'm always astonished when people shoot lead-cored bullets into animals and then are astonished when the bullets lose some weight, yet the animal still dies.
If we want out bullets to come out looking exactly the same every time, then we need to shoot bullets without lead inside. It's that simple. Or at least it is most of the time. I've recovered a number of "no weight loss" bullets that lost some weight, but oddly enough they were all from dead animals.
