As far as entry wounds go, my hunting partner last year took a buck at 125 yards with a .300 RUM, using that Winchester Ammo that comes in the silver casings with black ballistic tips (Black Talon, I think)???

At any rate, he hit the same location, it was a quartering-toward shot, where the bullet impacted just in front of the shoulder. There was no exit wound, just a softball-sized hole left at point of entry.

The wound was ragged around the edges, with lacerations and slices going through the surrounding hide and meat. Some bullet fragments did penetrate into the chest cavity and caused severe damage to the heart/lungs, but those fragments did not exit.

Again, that was softball-sized, but I'd say this hole looks a bit larger.

As someone posted above, relatively heavy bullets with little or no structural integrity(over 100 gr.) traveling at extreme speeds are capable of devastating and very unpredictable results, IMHO. The density of the target also plays a role.