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What does it take to neck down 300 RUM brass to 7MM RUM

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  #1  
Unread 02-19-2004, 04:29 PM
dwm dwm is offline
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What does it take to neck down 300 RUM brass to 7MM RUM

Can I just run the 300RUM brass through my 7MM RUM dies and be done?

How much will the neck thickness increase?

My 7MM RUM can't use factory brass so I will have to turn the necks anyway. (tight neck chamber)

Doug
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  •   #2  
    Unread 02-19-2004, 05:30 PM
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    Re: What does it take to neck down 300 RUM brass to 7MM RUM

    Yes you can...............No way of telling.........And yes you will........ [img]images/icons/wink.gif[/img]
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      #3  
    Unread 02-19-2004, 09:18 PM
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    Re: What does it take to neck down 300 RUM brass to 7MM RUM

    Agreed. I've done hundreds. Run them through a full length sizing die & fireform.
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      #4  
    Unread 02-20-2004, 01:32 AM
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    Re: What does it take to neck down 300 RUM brass to 7MM RUM

    Doug,
    Size, turn, shoot, and enjoy how easy that was! [img]images/icons/smile.gif[/img]

    I doubt you'll see a substantial increase. Going from 338 to 30, I don't. But I too must turn them anyway.
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