My job in the sandbox this time is as a fobbit. It is extremely boring and shared with people of little imagination. Forums like these are my only source of intellectual stimulation. So forgive me if my question sounds like one cooked up by someone with a lot of time on his hands. I've seen a lot of "FAL vs. CETME/G3" discussions on other forums. Ergonomics seems to be the most common comparison, but occasionally someone mentions reliability. Many point to the FAL's adjustable gas system as a plus for reliability and touch on the G3's lack of it as just fortunately not detracting much from reliability due to its recoil being overpowered. But the more I study it, the more I think of the roller delay as being self-adjusting. It appears to me that a low pressure cartridge will cause a longer delay in opening. But that is a good thing, since the bullet will take a little longer to exit the barrel and lower the pressure inside. Conversely, a high pressure cartridge will have less delay but still be safe due to the bullet exiting the barrel that much faster and again relieving excess pressure. Obviously, the fixed mass of the bolt and carrier are not variable so there would be a definite minimum and maximum end of the reliability/safety scale. But the lack of a need to tap gas from the barrel to unlock and open the bolt on the roller-delayed blowback would seem to make it less sensitive to the pressure-curve of the ammunition. Pressure would relate to bullet speed and bolt opening speed more closely in the G3 than it would in the FAL since port pressure in a gas system varies depending on the particular pressure curve of the powders used. Am I right, or do I just have too much time on my hands?