I was shooting with my buddy and he was shooting his 280 and i was shooting my 7mm-08. We were taking turns shooting and he had his sighted in and he said he would shoot one more shot. So he shot and it hit about 10 inches high on the paper, he couldn't figure out why untill he ejected his shell and it was one of my 7mm-08 shells. Could this have damaged his barrel? He shot a shot after that and it shot fine, but he was just wondering what kind of damage it may have done?