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It's extremely rare to have brass fired out of a rifle then it can't be sized again with full length sizers in same rifle or even tight in neck sized brass for at least 3 fittings before shoulder needs bumped back...
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It's rare but I have one of those rifles. A custom 300 win mag that I tried three different sizers before I found one that would bump the shoulders enough to chamber. RCBS and Redding dies wouldn't do it but Forster would.
