RE: Brass for 300 RUM
do yourself a favor and stick with rem, unless you can find some fed. nosler brass takes very lil prep work, but it won't last long in a high intensity cartridge like the rum. I used some nosler 270 to form 6.5 gibbs brass, the same loads I used for fireforming in the rem brass were blowing primers in the noslers. they are just too soft to handle much pressure.
RR
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