OK So I want to sight in at 100 yds, so I set the bead for the bottom of the bullseye at 100yds, but still want the shot to hit the center of the bullseye?
No. If you are sighting in for 100 yards put your target at 100 yards, put your bead at 6 o'clock, adjust rear sight until your shots land at 6 o'clock on the bullseye not center of bullseye. Hits on the paper higher than that will coincide with being zero'ed for longer distances.
