Due to tolerances in axial dimensions it is nearly impossible to get everything right under mass production constraints. this is why some action bolt combinations have PE issues. Why do you believe you have PE issues? If it is due to difficult extraction on fired cases all you need to do is stick a feeler gauge between the ACTION and the REAR BAFFLE. Go up in thickness until the case extracts easily. If you can't lift the bolt under any circumstance with a round or empty case in the chamber you have a different problem.
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