Another way would be to add material to the bolt or barrel lug and then remove to refit. Not too easy of the task either.
I see that at one time my G grade had some material brazed onto the bolt in order to tighten the breech up. It works just fine, good and tight. But the only issue is that the soft brazing material tends to make the bolt stick in the lug if the lever is snapped closed. Thus making it a tad difficult to get the top lever to move next time opening. But if I Let the top lever back by hand, no issues.
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B. Dudley
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