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Reloading Berger Bullets

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300 Rum case runout

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Unread 07-30-2008, 05:54 PM
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Join Date: Jul 2008
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300 Rum case runout

I have noticed that a fired case has a neck runout of about.002 . when I resize with my RCBD dies i have about .005 neck runout. I would like to get the neck inline with the case body with minimal runout. Any suggestions. on dies or neck bushing . Not sure what I need.
Toklat

Last edited by toklat04; 07-30-2008 at 05:57 PM.
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    Unread 07-30-2008, 06:58 PM
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    Join Date: Jul 2004
    Location: OHIO
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    Turn the necks on a couple and see what that does. As I've mentioned in previous threads, you can also remove the expander, size a few and check them. If you have little to no runout on those sized brass, then your expander is likely a cause of some of the runout.

    I sent my sizer dies back to the manufacturer and had them hone the necks to where the OD of the sized brass is .002 less than a loaded round. No need for expander. No runout caused by die.
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