Ok after reading it I agree. If you shoot "Head on" in the center of the chest it will end up in the guts might even make it to the back hams. I've done it before. They wont take another step if you hit them where your aiming, but there's not much to stop the bullet. Kind a reverse Texas Heart shot.

I misunderstood what you meant totally. I thought you meant that they said not to take a broadside shot, and you should only take head and neck shots.