First test loads were shot this morning, Savage 110T with Burris XTRII 3-15x. New Starline cases, F205MAR primers, 29.5, 30.0, 30.5, and 31.0gr WW748. 90gr TGKs were seated in the Forster mictometer die to 2.300", so put the shank of the bullet 2/3 down the neck. 31.gr pushed the bullets out to 2.310" so obviously compressed. I tried bullets out as long as 2.34", but didn't think there was enough bullet in the case for strength, and they still didn't touch the rifling.
I was shooting @12x at steel plates at 300 yards. Wind was variable and gusty, so not the best day for real groups. 90gr TGKs were shooting 3MOA higher @300 than Hornady Black factory ammo. Once I realized that all I needed to do was aim center and watch the wind flags, I shot 5 shot groups. ALL of the groups were wider than tall, and usually had 3 or more shots inside 2". 30.0 and 30.5gr were shot again, and both were sub 2.5" with the 30.5gr looking closer to 2".
edit: those 1x cases have 1.0gr more capacity 748 than the new cases had
I was shooting @12x at steel plates at 300 yards. Wind was variable and gusty, so not the best day for real groups. 90gr TGKs were shooting 3MOA higher @300 than Hornady Black factory ammo. Once I realized that all I needed to do was aim center and watch the wind flags, I shot 5 shot groups. ALL of the groups were wider than tall, and usually had 3 or more shots inside 2". 30.0 and 30.5gr were shot again, and both were sub 2.5" with the 30.5gr looking closer to 2".
edit: those 1x cases have 1.0gr more capacity 748 than the new cases had