Maybe the longer, high BC bullets tumble after entering and that is what is responsible for the damage ? The 75gr 223 match bullets I use on coyote seem to do that. If the velocity is still high the bullet will tend to break up when it tumbles too, thats like a hand grenade. My experience with 95gr SST's from a 243 Win is that when I shot a coyote in the butt, the bullet did not exit. It did not even take one step. The second of the pair was a pass through, behind one front shoulder and out in front of the opposite side. Everything between those shoulders looked like it was run through a liquidizer. I now am using 95gr Bergers in my 243AI and will soon be loading 105s in the fireformed brass. I think any of these high BC bullets is devastating on smaller game animals. We can't hunt deer with a rifle in this part of the country so I can't tell you how that works...