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

Discussion in 'Long Range Hunting & Shooting' started by dwm, Feb 19, 2004.

  1. dwm

    dwm Well-Known Member

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    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
     
  2. Boyd Heaton

    Boyd Heaton Well-Known Member

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    Yes you can...............No way of telling.........And yes you will........ [​IMG]
     

  3. speedbump

    speedbump Well-Known Member

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    Agreed. I've done hundreds. Run them through a full length sizing die & fireform.
     
  4. Brent

    Brent Well-Known Member

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    Doug,
    Size, turn, shoot, and enjoy how easy that was! [​IMG]

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