Quote:
Originally Posted by muddocktor
Wise A, 357 brass doesn't shorten with use, it grows. And the same for 44 Mag brass too. It doesn't react like semi auto brass.
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Rimmed, rimless, necked--they all do both, depending on conditions. Sometimes I'm shocked at what people subject their brass to. Ordinarily, though--yes, you'd be more apt to see it in a mouth-headspacing rimless case.
Quote:
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Originally Posted by TAROMAN
Try this:
Get a Lyman "M" expander die.
It's made for loading lead and expands the case deeper.
What I use to load 357 wadcutters, Never a problem.
The RCBS die is made for loading jacketed bullets.
More "flare" isn't the solution.
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I would typically agree, but the problem isn't that the expansion/belling isn't deep enough, it's that the case mouth isn't opened up wide enough. I'd have to be there to run my Finger-ometer over them, but the cases in the picture barely look like they've been expanded at all.