That is great he is liking it. Sure beats the 12g shotgun I shot about his age
I now flinch, even with a .22.
I will say, we have a .44 also. We have been shooting 200gr reloads, medium load. There is no kick. I bought ours when Indiana opened up to pistol cartidge rifles for deer. My boy has carried ours since. Unfortunately he has not had a shot at a critter since. Hopefully this year.
Good luck, and thanks for getting another young hunter started.
Lonny