One of the PGC WCO's conducted a test a few years ago before the PGC switched from revolvers to Glock 357 sigs. He used ungutted road killed deer with a ballistic vest behind the chest to catch the bullets. He used various calibers and various bullets from plated lead to hollow points. All shots were taken at 7 yards. Very few of the bullets expanded. The ones that expanded almost always hit ribs or the shoulder otherwise the hole coming out was the same size as the one going in. He conclude that if you want a big hole coming out you need a big hole going in.
