@ mugsie In my experience, GC rifle bullets fired without checks are not near as accurate as the same bullets with checks. It's difficult enough to get a perfect base on a long, skinny plain base bullet. When you add in the groove meant to take the check, it at least doubles the odds against a perfectly flat and concentric base. As the bullet exits the bore any imperfections will cause the bullet base to be pushed in directions other than straight forward by the high velocity gasses rushing past the bullet. I've had better luck with subs than I have with more powerful loads, but they're still not as accurate. If you want to move away from using gaschecks you might want to consider a plain base mold. I should say that I have no experience with these new high tech coatings. I'm speaking purely from my experience with traditionally lubed bullets. For all I know, the coating process may change ALL the old "rules".