I thought you weren't gonna persue it any longer?

Anyway, I don't agree much with Ch.111, but in this case he's right. Most of the time, not always, but most of the time when a bullet passes completely through an animal, it has not caused the same amount of tissue damage as a bullet that has tumbled inside (thus preventing pass through), or one that has struck bone (thus causing tumble and bone fragmentation). Most commonly, a bullet will pass through due to being light combined with high velocity, and not striking a hard surface (bone).