7mm ultra mag sizing

Discussion in 'Reloading' started by remcraz, Jan 1, 2010.

  1. remcraz

    remcraz Well-Known Member

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    Sep 26, 2008
    I have a question. Can I run a 300 ultra mag brass in a 7mm ultra mag full lengh die and trim to correct lengh and shoot it in a 7mm ultra mag. I guees I am trying to say will that be the exact same as a 7mm ultra
    Thanks Ted
     
  2. DCGS

    DCGS <strong>Official LRH SPONSOR</strong>

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    Dec 5, 2007
    Yes, I run 300rum Nosler brass for my 7rum. It's not great but it is better than Rem. The primer pockets last a little longer and it is more consistent. Dan
     

  3. remcraz

    remcraz Well-Known Member

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    Sep 26, 2008
    Thanks for the great info. Dan. The reason I was asking is I had ordered 500 once fired brass and noticed when sizing them the holes in some were the same as my 300 ultra and were very hard to size. I then got one of my 300 ultra and ran it in the 7 ultra die and it looked the same as the 7 ultra cases. I dont know a lot and am glad you guyes are around for the great info

    Thanks again
    Ted