He's going to hopefully shoot a deer or ten with the thing.
A deer? ...for his first hunting prey? I'm not a hunter, but wouldn't it be better for him to start with something smaller, like squirrels or rabbits? I assume there will be someone accompanying him. Correct?
That said, from what I've read, a 20 gauge with slugs can be an effective deer round at short distances. However, that will definitely not be a low-recoil load. And if a deer is the goal. I would think it would completely rule out the .410 as a choice.
JoeR