Just ordered the Superlative GB for my sfar this morning and a new gas tube...hopefully this will help get me closer to my goal of 0.5 groups.
Just loaded some seating test loads with Sierra 150 GKs and imr3031...
Ruger sfar 20" in 308...shoots 3/4" groups with my handloads with Hornady 150 gr SSTs...rough on brass with bent rims on #2 setting...and after 5 reloads had some primers pop back ...not unusual for full length sized brass. Will load some this week and try #1 setting and see if it will run...