Kurt, I would never shoot brass cases in more than one gun unless the guns had identical chambers. If the cases need resizing, quit using that lot of cases in the smaller chambered gun and get some new cases for that particular gun. We don't want to be "working" brass cases every time we load them. They will not put up with much of that. The same goes for chamber inserts that are relatively thin, like 8 to 10 or 10 to 12. If you shoot a heavy load in a thin chamber insert, it will expand and not fit in the smaller chambered gun any more. I have been bitten by that dog before and now dedicate thin chamber inserts to one gun only.
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