I may have been over thinking it on the reduced loads. Youth duck season was this weekend and he went through a box of 3” 20 gauge #3s and handled it fine. He’d only shot skeet and dove loads out of it before. So I’m thinking he can handle full 7mm-08 loads. He’s 10 and a pretty good chunk but hadn’t shot a rifle larger than 223 so I had hesitation about jumping him all the way up

He got his first duck Saturday morning. It was in the high 30s and as soon as it hit the water he put down the gun in jumped in to swim for it.