Went out yesterday to verify drops as far as the scope had travel. I had verified drops to 800 during development and Ballistic AE showed velocity at 2965 fps when entering all pertinent info.
Shot a group over the chrono. Average was 2965 with an SD of 3
Used that data to to make multiple impacts at 1580 yards in 13-15 mph cross wind. 2 mils
The 9 twist causes no degradation of BC whatsoever
Rick,
Glad they are shooting so nicely for you!
Are you using the published G7 BC from Berger? I'm thinking either you're high enough and in thin enough air that the 9" twist isn't causing your SG's to come below 1.5, or else you're getting published BC's even with an SG of under 1.5, and you'd get even slightly better BC values with a faster twist. Interesting...
