So 308 175mk 41-42 grs of imr 4064, coal 2.800. At 500 yards the vertical is 1-1/4 inch spread, that's the best node, but my horizontal is 3-4 inches. So I'm still doing load development, but I'm wondering will shortening coal help horizontal dispersion? I can't go longer due to mag length. Also what's a good increment to decrease at a time?