I have a 30-40 Krag. When I shoot it, the brass gets a little tiny bulge on the side from a chamber defect. I can see it when I look into the chamber. Anyone know a way of fixing this? Or is a new barrel the only cure? I don't think it is a danger to shoot, but I don't want to reload brass with the problem. I haven't loaded any yet, but have about sixty rounds of factory ammo for it. Thanks.