I havent tried the partitions . My groups with tsx 250grn and Rl22 with 87.2grains was under 1'' No complaints with this combo!! . IMR 7828 87.5grains with 225 accubond was 1 1/2 " and RL22 82 to 84 grains 1 1/2" group that was the best I've got so far . I guess thats nothing to squawk about but with Accubond having higher BCs than a 250 TSX i was expecting a better results