My son and I shoot M-1's in the CMP Garand matches and the occasional NRA Hi-Power match.
Joe started shooting the Garand when he was about 14, 6' tall and about 120lbs. Never heard any complaints from him about recoil, never could leave the range with any ammo either.
I found a clean 5.8 million Springfield for him and we put a tight new stock on it, I think it shoots better than my rifle.
Last fall, when Joe was 17 we had a hard fought battle at the local CMP match, ended up first and second. That afternoon he got invited to hunt whitetail deer with his girlfriend's dad and and killed a nice 5x5 buck. Made me fell like I'd done something right!