This cartridge is amazing...

[SuaSponte]

Doesn't opening it up past halfway put it in bleed mode? The way I understood how they work was the lower setting up to 18-19ish is normal to restricted. After that is the bleed modes ,which is why I chose it, for shooting suppressed. I would think that it would not be good to bleed when unsuppressed for reliable operation?

  Please don't take this as being argumentative, I'm trying to learn this gas system tuning.

***Nevermind, I understand now I think. By bleeding excess gas instead of restricting, it's cleaner running for the gas block and the BCG... Am I on the right track?

Restrictive Mode can cause seizure, even on SA blocks - it was designed for bleed off mode. Dead Air actually metered a 5.56 gun at every position (0-45), and found that ~30 clicks out gave the best compromise of both port and muzzle dB reduction.



You understand the concept correctly, but if you are overgassed to start with, you have 3 options: Bleed the gas, which adds zero weight; Up the spring rate; or up the buffer weight (or all 3, depending on how bad it is). Going after the gas is easiest. Higher spring rate and/or more buffer weight increases the rearward and forward impulses.

Other than your possible carrier speed problem, just running Carbine/Carbine will usually "work" - but it's usually more gas/carrier speed (wear) than needed. And here's another thing to consider: When tuning a gas system/spring/buffer; different ammo will require different settings, at different temperatures OR just use your weakest ammo at low temps and call it good for everything else.