So far, mine did NOT cycle 90% of the time. (Barnes TTSX 168s or Surplus Hirt 7.62)
A friend readjusted the gas block, and tightened it down properly.
Supposedly had a lot of fun going through the rest of my ammo

(Yes, even the surplus)
Roughly 2 moa with the surplus Hirt rounds from the pictures I got from him.
Mine seems to have a 3 shot tight group, then a flyer. This is with multiple shooters.
Only other issue I noticed is feeding is different whether I put magazine in first, or lock back the bolt and use the release.
Even magazine doesn't feel the same (magazine spring tension I assume) when inserting it.
Trying to get into the habit of inserting mag, then use the bolt release.
Sounds about as good as a switchblade or a motorcycle, so no complaints.
I got to say, this is my end all firearm. Target, plinking, moose and deer.
If I can just lighten the front end a bit, this rig is perfect. (I got the m lok NR version)
Faxon and different handguard someday... When I have a spare 600$ laying around.