before you ship it to Salbo, go back to the range.
If the gas reg nut is turned all the way shut then all of the gas should be going back to cycle the bolt.
Sounds like the Gas plug is turned the wrong way.
Turn the gas plug the other way and set the regulator on 5 or 6
Fire a couple of rounds and see what you got.
Keep in mind that the regulator needs to be adjusted for each brand of ammo you shoot. Yes, you can set it so it will shoot everything, but then it will beat your shoulder to death.