I have a 1 year old Remington Sendero in 7mm Mag. I noticed my groups are not what they used to be. Was about 1/2 and turning into 3/4 inch at 100 yards quickly. I noticed a bump on the rim of my bolt past the lugs. The lugs look fine but it appears to be a flat spot worn pretty bad on the last quarter inch of the bolt and a bump on the rim that is easily seen and felt. Appears to be a small washer on the inside of the wall that is part of the bolt where the "bad" spot is. Does anyone know what this is and if it's a problem? Sure doesn't look good. The blueing is gone and is a hump on the end of the bolt rim.