I hope you read the installation instructions as you need to be .025” off the barrel step to properly align the ports on block and barrel.
And the instructions also tell you to start at 4.5 turns out as that is full gas to bolt. Check the rifle is operating correctly , you can either start turning the adjuster back in (restricting gas flow) or turning it further out ( bleeding gas to atmosphere. more open = less gas to bolt) to get desired feel. ( typically less bolt recoil feels softer ).
The advantage of bleeding to atmosphere instead of just restricting flow is that , for a suppressed set up , you get less back pressure than you would by just restricting port size.
EDIT ADD: The superlative is a two port gas block with a restrictor screw running through them. When restrictor screw is fully in the block, all gas to both ports is blocked (one port goes to gas tube, the other to atmosphere). As you open the screw the port to gas tube is gradually uncovered and fully open at 4.5 turns. Once you go past 4.5 turns the other port to atmosphere starts to open and gas is now going through both ports, bleeding off pressure instead of restricting it.