That might be kind of high recoil. I know my even 15 year old would struggle with that off a bench unless I put a much heavier scope on my Wolf. Could work great. But I know my weedy 13 year old would get broken in half by that load. He thinks my .223 bolt gun is uncomfortably high recoil for him (my 15 year old shoots my Garand from a bench sometimes. He isn’t strong enough to shoot it off hand with any accuracy).I meant to say "using 50 grain pellets".
The standard deer charge of powder is 100 grains, or 2 50 grain pellets.
A lot of practice with a 22, and then basically only hunting shots might be okay except the smallest of kids. But a lot of practice with the ML is probably going to give any kid who isn’t big or an older teenager a bad flinch. (Or maybe load it with only one pellet for practice and two for hunting).