I'm 6' 1" and I weigh about 185. I'm a little on the thin side but I'm not a little guy. I can shoot a 30.06 all day with no recoil pad or recoil reducing devices.

If I try shooting a Remington 300 Ultra Mag without a muzzle brake, it kicks my skinny ass. It's just to much for me to handle. I can see it doing physical harm because the recoil is so hard and quick. I love the 300 ultra mag and it is my caliber of choice. I just had to tame it down with a brake.

I hope your friend heals quickly.