Muzzle energy was in the region of 2590ft-lbs and at impact in the region of 1900ft-lbs. It penetrated through the shoulder blades and ribs on both sides. Had it penetrated larger bones I believe I would have been able to recover the bullet.
Last year I shot a blue wildebeest with this same load/bullet. The bullet was on the other side of the wildebeest just under the skin, but then the workers had flashed it down the drain. Terrible!
However, I had Hornady Interbonds recovered from 2 Kudu before and they had a 84% weight retention. Muzzle velocity was +-2830fps. What was more incredible was that the diameter of the mushroom was 16.8mm from the 6.8mm bullet of the .270Win. This is nearly 2.5 times the original diameter of the bullet.