If a projectile is actually going through something it is not knocking it down. It is transfering its energy in all directions, including rearward, when traveling through an animal. It is not transfering its energy in only the horizontal direction. Have you guys ever watched a slow motion video of a bullet traveling through something like a water filled jug or a water mellon? There is very little horrizontal movement of the target rather the target usually explodes in all directions.

I don't know how to explain this any better to you guys but bullets do not knock animals down. It simply does not happen. There is no such thing as knock down power in a bullet.

Think of puting a powerful fire cracker inside an animals lungs. This is much the same effect that a bullet has on animal tissue.

You either break down both shoulders or cause enough trauma to the nervous system to stop the transfer of signals from the brain to muscles.