I know some purists will disagree and they can modify at will...but we now have what is very near a SAAMI 6 PPC. It's really the one that makes the most sense for a brass mfg, imho. Make 6 ARC brass that's equal to Lapua 220 or Grendel brass, with small primers and small flash holes, a loaded unturned neck od of .269-.270..and you'll own that small portion of the brass market.