I remember a few years ago when I was a wee lad, my dad used our HK USP to kill a cow we were going to butcher. It was a large cow for sure. He shot the cow in the forehead, right throught the brain, with cheap hardball. When we butchered we found a wound channel through the base of the skull all the way down the animal's neck, in the muscle. We found the bullet buried in the what I think is the sternum, breastbone. At least 3 proably a good 4 feet of penetration through real tissue. Definately surprised us.