I shoot the 65 gr SGK in my 7, 8, 9 and 10 twist .223's/5.56's over 27 grains of Varget. I get real close to 3000 in the 20" barrels, haven't chronographed the 16 and 18 inch ones.
This load, at 2.240 LOA works in all my rifles and gives exceptional accuracy. I have killed good sized deer out close to 300 yards with it.