I would second the 75 grn. A-Max.
Only you know your son..sounds like he has the interest as well as the ability, with your guiding.
Mine was the same..
Thanks I can’t step out of the house without him on my heels wanting to go look for sheds or shoot a 22.. I don’t push anything on him I just let him show me what interest him.. Outdoors,fishing an hunting is all he talks about
