If not suggested yet, try these. Out of my Custom M- 40s I build, I load Sierra 168gr. MatchKing HPBT. with 42grs. of IMR. 4064. Vel= 2,550fps. You will need to figure out your optimal OAL. For more Extreme Distances and better for bucking wind, my load is: Sierra 175gr. MatchKing HPBT on top of...