Thanks Cooch;

Here's an interesting article relating to same.

www.gunsandhunting.com/bulletshootout.html

I always get a little nervous when mathematical models are used to predict performance. I also prefer a hard/soft testing media. Ballistic gels and wet paper always seem to produce good "mushrooms" but do not necessarily look like bullets that I dig out of game. The bullets I recover from my media generally do.

I think Ganyana makes all the points agreed to here; that sectional density can be a predictor of sorts, but not exclusively; bullet construction does matter...alot.

Also, people DO often compare apples to oranges, and use SD as singular predictor of performance, which it is not.