I am running a McG 26" 8" twist with 35g of IMR 4350 under the 80g Bergers. I can't decide if its my favorite or my 6XC. I am getting 3200 out of my 8" twist so your not that far off that. I could get some more speed out of mine, but I am trying to get some more barrel and brass life. I was getting pressure signs at 36 grains, I have not gotten a chance to try 4831 ( I don't think it can get any better)