27" Krieger
33.0 - 2,860 FPS - ES up to frigging 30
33.2 - 2,876 FPS - ES still about 25
33.4 - 2,888 FPS - ES still about 25
33.6 - 2,906 FPS (best accuracy) - ES 16 SD 8
33.8 - 2,924 FPS (next best) - ES 14 SD 6
^ These are only small sample sizes of 5 shots.
I ran off: .010, 020, .030, .035, .040, .045, and .050. I had the most luck at .040 (which is what I ran the charge weight test at) but was throwing the single flier, so I tried in and out .005 but without luck as that opened it up further.
There was zero pressure signs, but 33.8 was starting to open up. 2,900 was my target velocity.
Historically, my rifles/barrels that shoot Varget well will maintain an ES of 15 or less across an entire charge range. I've got plenty of powders to try on hand (N150, RL-16, H4350, SW LR, RL-15 etc...). Once I get this round of brass shot and prepped again I'll probably try after the 107s one more time but with a different powder.