Do you find the HS-6 to be a little dirty? I used the EXACT same recipe as you for a while. 6.4gn HS-6 but was finding a lot of unburnt powder on the bench out of a 4\” Walther PDP.
Those RMR 115gn FMJ RNs are a treat though. VERY consistent groups with that 6.4gn load.
