RE: Deer tail end shot
(I believe you have tried it but for the life of me can't see you could get to the vitals without hitting the small intestines, the bladder or the gall bladder pancreasor stomach. All which put out some sort of nastiness on you meat.)
Useing NP's, "if" you shoot just over the poop shootor at the top of it, the bullet will go over the guts, andall the way to the other end of the animial. When the bullet first expands it will damage the back bone and spinal cord anchoring the animial. The animial will bleed out with this shot.
There "will" be meat damage and if anything at all gets on the meat well, i cut it away with all the damaged meat.
If the bullet goes a bit higher it will take out the back bone, higher yet it will hit the neck or head. Like i said, use of the proper bullet of enough weight for the cal., makes it happen. Weak bullets or small HV calibers need not apply!!
I used this very shot one time on a brown bear. It took out at least 12' of back bone and anchored him right there. He died very quickly, in fact was dead by the time i walked up to him.
Robert