Took the 308 to the range today. About 48 degrees @6000ft.
Trying to get some decent accuracy at velocities above 2500fps. Had one group that did pretty good, but what suprised me, is that is was not the 30 XCB boolit, but the HM2 311-160 boolit. Sized .313" in Laupua once-fired cases, WWLR primers (might try mag next time) and Ramshot Hunter Powder. Gun was something I put together. Started out as a 6mm br FT-R Savage rifle that I ended up getting a used Model 12 308 barrel and installing on the rifle.
Only had 10 rounds or each type of boolit. First to be shot was the HM2 311-160 boolit. First shot, cold barrel, was at top of target, next three shots were in a diagonal from 7 O'clock to 1 O' clock and next five were between the outer twomost shots, for a total of 8 shots. Last shot was over the Chrony @2,656 fps.
What was suprising was that the XCB boolit had three shots into a 7" vertical dispersion, and all others I tried, the gun hated. So didn't shoot all of the others.
Pic of the HM2 group and there might be two of the XCB there too in the circle to the left
A word on the alloy. Will have to get my notes to be exact, but it is roughly 92pb/4.1sb/3.6sn/.12as/.18cu/.02ag. Boolits coated in thinned LLA (1-10 lla/mineral spirits), then let dry, then lubed normally in my Star