Muddyboots, Don't take this the wrong way, but I believe I read that you "might shake an arrow off the rest." There's your problem. You are too close to the deer. Move back about 250 yards and he won't look so big. I know it will be a long shot, but if you start practicing right now, who knows?
Just kidding. I have put my bow aside and now hunt with handguns. LongRangHunting is sort of subjective. It is very satisfying to reach out and touch one with my 7 mag., but I also like sneaking up on the little rascals with a handgun. There is still something for me about the smell of gunpowder in the air. I hope YOUR son gets him. Good luck.