I think the hit has as much to do with blood trail as bullet, just got back from hunt in which one deer shot with 300 xtp mag double lung right behind shoulder bullet exited and had a blood trail a blind man could follow. 100 yard recovery. another deer shot with barnes expander, double lung right behind shoulder bullet exited no blood trail at all saw deer go down 100 yard recovery. No two hits are ever the same, strange things sometimes happen when a bullet hits. Why didn't deer hit with barnes bleed more? who knows, you could stick all your fingers in exit hole? did bullet fail? I think not. Deer still dead