Quote from sheriffs deputy in paper " He was using some high primer ammo and the follower hit the primer, blew the barrel out". Thankfully he has non life threatening injuries. That's all I know. My guess-could have been a squib load that plugged the barrel, and he followed with a second shot. Or I suppose it could have been a high primer. This was Cowboy shoot weekend at the range, so there is a good possibility he was shooting lever action. What do ya think? What can we learn from this?