RE: For All you 223 Fans
I guess the part that confuses me by this "bullet that barely exits is best" theory is this.
Let's say, just for example, that the deer's body is 10 inches wide. Let's say, for example that a 150 gr. .30-06 hits with 2900 ft lbs. and a 7.62 X 39 hits with 1800 ft lbs. Let's imagine that the bullet does as you said, and expends all that energy and drops out the other side 1/100th of an inch past the body, with 0 remaining foot pounds.
Now, the 06 is hitting harder and exiting the other side, with significant remaining energy, say still having 1100 ft lbs. It has still shed 1800 ft lbs in passing through the body. And, when it hits the off shoulder and is breaking through, it's doing so with significant force, whereas the 7.62 X 39 is barely penetrating. I just don't see how hitting hard all the way through is worse than hitting medium and exiting soft... Doesn't make a bit of sense to me.