I have predominantly been using 4064
For the bl-c2 load I was using 42gs of powder in the 168match.
other loads I have done have been using 4064 with 165gr btsp, 150gr fmj, 165gr ballistic tip, and the bthp match. All test runs.
for the powder loads, they have varied from 42grains up to around 50 (iirc)
I am using a remington 700ltr.