Wait ! look at the rim of the case … the deep imprint is on the " bolt " side ( the way I see it ), check to see if the back edge,, of the extractor is flush with the " face " of the bolt, the imprint is on the back side of the rim , ( I could be " wrong ", just something to look at. That is why I said to tight a head space.
coffee's ready ,, Hootmix.