There's a really interesting website that uses actual data to refute a number of cherished beliefs about fpe, 'knock down power' etc:

http://www.rathcoombe.net/sci-tech/ballistics/wounding.html

And another using data from the new Bullet Test Tube (with embedded deer bone) got some surprising results:

http://www.gunsandhunting.com/Bullethitsbone.html