???
Not sure what you mean. I have no doubt that my cartridges chamber fully. I can certainly load and eject them by working the bolt, and the M77 bolt has the traditional claw type extractor of the Mauser tradition. Even if the shoulders are a bit back from what they should be, the extractor is closing on them like it should. Not sure if that means anything about the headspace or not. What will the tape across the bolt do?