44 Mag comes in different levels.
There are the heavy mags 240 and 300 grain bullets
Medium Mags like the Winchester 210 Grain silver tips and the Remington 180 grain Soft or hollow points
Last the light mags/ hot special rounds. -I make a 180 grain bullet at 1,000 FPS out of the revolver in the 44 mag case
The 200 grain silver tip Special is a pleasure to shoot out of my little ruger carbine the same with the CCI gold dots. (they do not function the auto loader) The big heavy hollow point will hole both lungs on a braod side deer and as long as you keep his shots with in his tallent he should do OK.
Wathc hin shoot . He may be holding he rifle away from his shoulder giving the rifle a running start into his shoulder and increasing recoil. Load an empy case for him, make him think it is a live round and see what happens when he pulls the trigger.
My firend's kid will shoot one of my 30-06, the carbine 45-70, but you bring out the Auto loading 44 and he has this mythical thing about the power of the MAG! When clearly the 45-70 out of a 20" barrel, even with the cowboy loads has more recoil. The 06 he shoots till we are out of ammo and no complaints. It may be jus the MAG word, Dirty Harry did a lot to sell th 44 Mag and make it popular but those same movies made a huge reputation. I read some where that Harry's load of chaoice was the Remington Hollow point Keith 200 grain lead bullet in a special case. In the 90's when I first got a 44 hand gun, I loved those loads when I couold afford them. accurate and mild. A lot of fun to shoot. The CCI gold dots recoil the same.