I'm just happy for your buddy he wasn't seriously injured.
I know I'm the odd duck here, but that is one reason I do not shoot reloads.
My buddy has been reloading for years. He loves it and appears quite good at it. He's very detail oriented.
He got a new rifle a number of years ago and brought it and his hand loads to Montana Deer and Elk hunting. He went to unload his rifle one morning to get back in the truck and the bullet stayed in the chamber and dumped powder in the action. No cleaning rod in the truck and he was done for the day. Apparently the OAL was a hair+ too long.
I loaned him a handful of my factory loads and he was good to go the next day........