Ever since switching to a longer, and better barrel (Ballistic Advantage 223 Wylde - 18") with a rifle length gas system, I have been having cycling issues. Figured an adjustable gas block might help. 5.56 ammo cycles no problem, but I cannot get .223 to cycle. I tried adjusting the block by starting all the way closed, basically turning the gun into a single shot set up, which acted as expected. Then opened the gas block one complete revolution at a time with only a single round loaded in the magazine, waiting for the BCG to lock open. Gas block eventually opened 100% and still no lock open. Tried 2 different BCG's (both functioning perfectly before this) and multiple magazines. No lock open ever reached with .223 ammo (PMC Bronze). Standard buffer spring and weight, and I'm 99% sure the ports are aligned properly on the barrel and gas block, so don't know what else it could be??