Grew up shooting head and neck shots, but have taken some with shoulder shots as well.. I don't like the head shot as much as the neck shot mainly because I sight my gun in for long range shooting.. So I am about 3 inches high at 100 yards and dead on at about 250 and a little low at 300. The neck is a little longer than the head
. If the deer is 150 yards of less, then neck shot farther out than that and it is behind the shoulder... I think the head, neck or shoulder shots are ethical, I just pick the shot that I know I can make and take it.