I want pass throughs. First off, if there's an exit hole, then there's more likely a better blood trail. Secondly, the more of the deer's body the arrow passes, the more surface area/arteries/veins will be cut, and that's the bottom line.
In the case of a lung shot, if you go through both lungs, then the odds of the lungs collapsing(and the deer with it), are also much greater.
Two holes, lotsa blood!
Then there's another factor. If your arrow is sharp...REAL sharp...and you make a clean pass through in a non-vital area, then there's a better chance for that deer to survive the wound as opposed to if the arrow is stuck in there and "chopping things up". That's not to say that a deer can't survive with a broadhead lodged in it's body....I've help clean/ butcher at least 3 that have had encysted broadheads in them. But a clean pass through is preferable.
Offer No Apologies.....
NRA Endowment Life Member