300 RUM load dev
I just bought a new sendero
I zeroed out at 60 yards (4shots)with factory 165gr. Then moved out to 200 yards and fired 9 shots 200gr AB's with H1000 powder 88gr -92gr moving up by 0.5 per shot. 2820-3005fps
2989 and 3005 fps were out of group.
Pretty Darn happy for just load development stage. Next trip will be 90.5gr @2920fps @400 to see if they hold together.