Re: Any responses, please?
To me, it sounds like you just set your knob so that your infinity setting is at 400 yards. I know my Nikon tactical at the lowest setting is parallax free at 50 yards (advertised and tested by me). I setup the rest by finding objects at 100, 200, 300, 400, etc.... and figuring where my paralax setting for each was and made a scratch in the side parallax wheel. Make scratches where you see fit (the further the distance, the closer the scratch marks will be so you have to decide what yardages to scratch in). I don't see why you need to loosen the set screw and do all that?????? Good luck with which ever way you go.