[bingo1010]

just to add a little more to the stay in or blow through theory, the latest issue of successful hunter has an article on "bullet penetration" , those that think energy kills should pick it up and give a read. it compares a 06 to a 300 ultra on a gelatin block, the ultra entered the block going over 400 fps fatster than the 06 but exited going only 10 fps faster. the exiting bullets had approx 25 ft/lbs energy.... which is equal to 1/4 of the energy of a 22 lr bullet at 100 yards. so even though the bullets both exited, pretty much all of the energy, save for 25 ft/bs, was absorbed by the the gelatin. in neither case was the 12" square gelatin block " exploded" all over the place, despite the fact that it had absorbed over 3500 lbs over energy.