I have 1 .308's also that I run without adj gas block and suppressed with standard armalite reqoil set up. I havent put very many rounds in it yet but it works fine. πThe other has an adj gb but have to do more testing with the can on.. they will shoot! selecting an ammo of choice is key as well as everything else you put into your rifle. once you find what it likes , be consistent.π»πΊπΈ