CraigC
Sixgun Nut
At these slow speeds, consistent expansion is a pipe dream. You're sacrificing penetration and it's not necessary anyway, it's already a .45. So with expanding bullets, heavier is better, to a point. However, as I said, at these velocities non-expanding bullets really shine and at which point, if your 250gr is not exiting on deer sized game, there's something wrong with it. Maybe go up to 300gr to absolutely guarantee an exit but as I've repeated, 500gr is just absurd for deer. Has nothing to do with energy transfer but how large and deep the wound channel is. The quantity of energy expended in the process is irrelevant.