Ultra Mag Brass

Discussion in 'Reloading' started by Edd, Dec 21, 2012.

  1. Edd

    Edd Well-Known Member

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    Jan 26, 2011
    If any of you guys measure the base diameter of your new 300 or 7mm ultra mag brass, I'd like to know what sizes you are finding. I found one 3 year old thread where someone had measured .543". Is that consistent with everyone else's measurements?
     

  2. cbryant

    cbryant Member

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    Oct 2, 2011
    i measured a 7 rum at .544 at the base and the headstamp is .526
     

  3. 300 ultra

    300 ultra Well-Known Member

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    833
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    Apr 17, 2010
    .547 on Nosler brass