I shoot ACROSS THE COURSE NRA HP/CMP, I have found sub-moa groups consistently with your 69’s with 23.5 IMR8208, 24 grains of Vihtavuori N140. Wolf and Lapua brass and CCI450’s at 2.255 mag length for 200 yard and 300 yard stages. I imagine 23.5-24 of Reloader15 would be great and 22.8-23.2 of H4895 would be a solid grouping also.