D D, explain expansion below the rim, better yet, a picture is worth a thousand words!. If you do infact have excesive headspace, messed up brass is the least of your worries, I would be more concearned with a blow-out. Take the rifle to a local gunsmith and have the headspace checked, your safety is more important than a rifle that will group anything you feed it. If it does have a headspace issue, and you have a wife to deal with,your safety would be a good reason to have a new barrel installed.