Actually, I was thinking about a 300gr bullet at about 900fps from the RSRH. That would be well below high end 45 Colt +P. (Gunblast Chrono'd a Corbon 300gr at 1035fps).
I suppose I could just use Corbon brass.
Buffalo Bore lists a 300 gr. Speer J.F.N. (1325 fps / M.E. 1170 ft. lbs.) load that is safe for RBH and RSBH
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