7mm rum into 300 rum

Discussion in 'Reloading' started by remcraz, May 11, 2013.

  1. remcraz

    remcraz Well-Known Member

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    This might be the dumbist question on this site but I have a lot of 7mm rum brass. The question is can I size it into 300 rum or is that to much stretch
    Thanks
     
  2. Lefty7mmstw

    Lefty7mmstw Well-Known Member

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    half of my 300 rum brass is actually 7 rum brass. You may have a few necks crack on the first firing. I suppose annealing could help with that.