I know this is an OLD thread.
I have a couple straight pull No-Gas ARs in 22 Nosler I use @ 600.
With all the bad press on Nosler brass I figured No-gas would eliminate the trashed brass.
It did but with another issue. STICKAGE.
Shooting 60+ rounds and I have to swab the chamber after 40 or so, every 5.
Seems some carbon/residue is the cause. Manageable but annoying.
I use a right side upper from BCA and a modified lower for right side bolt release.
This year I put together one for the wife but this time with gas. Cut down the ejector spring, and adjusted gas so it locks back and ejects about a foot @ 2 o'clock. Using 6mm HAGAR brass reformed to 22 Nosler (22 NOSGAR) it seems to do OK. She's at about 1MOA @ 100yds.
Keeping the load to just under 3000fps with 88ELD and SB6.5
This winter I'll probably assemble another with gas to replace a long in the tooth one I have been shooting.
I have about 1700 Hagar cases left, about 300 Nosler/Dogtown.
Note that the No-gas is basically just an upper that I can swap with 5.56 and X39 using the same lower.