got a burris FFIII, and I'm having trouble sighting it in. I used a laser bore sight to sight the scope in on my Mossberg 535 at 25 yards. I took it out in the field and shot at a target at 10 yards, shot about 8 inches below the target. I thought that I had not sighted it correctly with the laser bore sight, so I adjusted the Burris. Shot the next target at 20 yards, was 8 inches high. Recalibrated, then shot the next target at 30 yards, was 8 inches high again. I was under the impression that when you put the red dot on the target, I would hit the target no matter what the distance from 10 to 45 yards. Wrong? What's the best way to get this scope sighted in? T