Congrats to your son! 600 yards... probably not. If it was I agree with the posters above that the shot should not have been taken. It was not responsible on anyone's part who was in there regardless of their experience. Anyone ever hear of spot and stalk?? Get closer and make a sure shot. Don't just close your eyes and cross your fingers. Again, it turned out well this time but next time it probably won't go so good. Until then, good luck to you and enjoy that deer meat!