I experimented with 160 partitions in 7mm08. Case capacity is an issue, which excludes many powders.
I tested W760 amd RL17 in lapua brass, fed210m, 2.800”, long throated kimber
W760:
44.6, 2.5” group
45.0, 3/4” group
45.4, 7/8” group, 2,710fps (22”)
45.8, 1-1/8” group
RL17:
44.8, 7/8” group...