Different animals react differently.

Deer are amongst the animals that will dash off until they drop from lack of blood to the brain, ie: total shutdown - sometimes it doesn't matter what you shoot them with, they run to the bush before dropping, or run through the bush 100yards before dropping - with no heart or lungs - competely blown up - yet they run. Sometimes, put a .45 or .50 cal round ball through their lungs and they drop on the spot- happens more often with a round ball than any other type - why? FPE - no - shape & subsequent preceeding shock wave - maybe? formula that would work all the time, let along most of the time? - not bloody likely.

I don't think it's quantifiable.(is that proper use of that word?)