So I worked up some more loads for the 175 Bergers.
Powders, StaBall6.5, RL 16, H-4350
StaBall was very disappointing, the best velocity I got was 2728 with a SD of 5 and ES of 16 after that pressures were erratic/dangerous
RL 16 was much better! single digit SDs
45.9 grains ES 24, SD 9 and average of 2757 fps
46.1 grains ES 16, SD 6 and average of 2767 fps
46.3 grains ES 10, SD 3.5 and average of 2780 fps
H 4350 / unobtanium! ( burnt my last little bit on this test)
46.4 grains ES 5, SD 2 and average of 2778 fps
46.6 grains ES 18, SD 7 and average of 2788 fps
Both RL 16 and H 4350 showed no adverse pressure signs, test was at 5,000' elevation and 49 degrees F
100 rounds on the barrel so far!
This is a hunting rifle primarily, McMillan A-3G / 26" Bartlein Marksman contour fluted left twist , gain twist 1n9-to-1n8.25 with Claytons Muzzle brake!
So far the Berger 175 Elites & RL-16 @ 46.3g load is right on the money, matches Bergers drop chart @ 2777 fps/5,000' elevation and the 6" steel @ 836 yards is no problem!
What a difference from my FNH SPR 20" .308, it's almost too easy now!