Just to ge a baseline I loaded 39, 40 and 41grns of H4831sc set just into the lands.

39grns did about 1" @225

40 and 41 shot about .75 @ 225 with the best group of the day being .633.

41grns of H4831(sc) is the max shown in all of my tables, has anyone used hotter loads with better success?

Going to work with seating depths and see if that helps.

I know IMR4350 and others are popular powders, would prefer to stick with H4831sc for now.