I'm starting with an FN PBR-XP .308, with a factory-equipped 20 MOA picatinny rail, and a Zeiss Conquest 3-9x40 scope (which is pre-zero'ed from the factory at 200 meters, not yards).
So now what? How do I zero this combo for 200 yards? Do I just run the elevation down by 80 clicks (1/4 MOA...