Sorry for your missing deer. Like was previously said, hunt long enough and it happens. It is easy to put quick blame on the bullet used, but deer are lost with others too. The best deer (205 lbs) I ever took dropped to a PP bullet---not intending to get into an equipment debate. The last deer that got away from me was a doe I shot at almost point blank range with a 12 gauge slug. I found hair, but no blood, knowing darn well I hit that deer square. Sometimes just no answers.