Gordon, David nailed it. Four years ago I got a new shotgun(BPS 10 Ga.) that had a fancy sight on it. I shot a full grown gobbler low and hit him in the breast. It knocked him backwards but he got up and FLEW OFF. I was very lucky and found him about a 100 yards away. When I cleaned him his insides were mush. In my opinion, IMHO, you should shoot the biggest head you can shoot and aim for the butt of the wing or the base of the tail. A string tracker should be mandatory. Michael