So, I think I found my load for the new Valkyrie.
Pulling the bullet out a little to 2.200” COL tightened up the group with the Sierras, but seating the ELD-M Bullets deeper had the opposite effect. I also tested charges at .2 gr higher (24.8 gr), and the Sierras group stayed about the same whereas the ELD-M’s started opening up again.
Here is what I’m going with...
Hornady brass trimmed to 1.590”
Remington 7 1/2 BR primers
24.6 of H4895
Sierra HPBT Match, 69gr
COL = 2.200
No crimp
100 yds
69 degrees F
Shooting due north with a SSE wind @ 4mph
Velocity just a shave over 3000fps
Two, 3 shot groups measuring...
.422”
.470”
Avg = .446”