Thread: .357 Sig
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Old 01-27-2010, 00:32   #2
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Join Date: Jan 2010
Posts: 157
It sounds like you may be flaring the case mouths too much. That will reduce or ruin bullet tension. It's sometimes recommended to not flare the case mouth at all on necked pistol cases, just seat the bullet. Do it gently to make sure you're not crusing the case. It would help to chamfer the case mouths lightly.
I'm sure others will come along with more insight and help you out.

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