RE: A bow hunters review of the Muzzy zero effect
"By adjusting the stop screw and center shot you should be shooting bullet holes in no time."
While "...adjusting the stop screw..." is an option, care should be taken when using this method. As long as you have enough tension of the stop screw against the stop plate, everything will work fine. If you have minimum tension on the stop plate, unscrewing the stop screw might cause a gap between the screw and the plate.
This will result in a tune that could be variable/inconsistent.