Bill Winke started his kids hunting with one 50gr pellet and a 250gr bullet. He limited their range to 75yds I believe, and they did just fine. I agree that a diluted muzzleloader load is the best way to introduce kids to gun hunting for deer.
I started out at 110lbs, with 2 3/4” 12ga slugs. And I busted both my lips with it too!!!! There was no such thing as target practice. I shot it one time at a paper plate, and never again unless it was at deer. I WAS TOO SCARED OF IT!!!!!!!!
A one pellet load could actually be shot by a capable adult with one hand….like a pistol.