If you do your part the suffering should be minimal if at all. I do feel bad when one does not die in its tracks.. But I have to remember that if that deer runs 50 yards before dieing then it died in less than a minute. Then I have to compare that to what would happen if that deer was not shot. If it got hit by a car, got sick or died of old age. Deer don't have hospitals or health care, if they get hurt or sick they are destined for an long drawn out death. 99% of the time a gun is a much more humane way to die for a deer.