Sorry for the late reply. My coal with the 87 vmax in the 6xc is 2.540. That will give me .025 off the rifling. I was mistaken I have one maybe two powders suitaby for it. H4350 and maybe 4831ssc. I will get some others if the H4350 doesn't pan out. The rest are real slow retumbo,h1000;7828ssc etc. Oh BTW using cci br2 primers