I have been wondering if my scope is messed up and this weekend I shot a couple of groups to find out. In the picture you will notice a group of 3 shots circled in yellow, center-low. Then a shot group of 4 circled in yellow, center-center. The big red circle notes a cluster of shots. The bottom right yellow circle of 2 shots is the final I shot for the day. 200 yards, 6.5x284, night force 5.5-22 nxs first 3 shots on clean bore. Move 1 moa up. Next 3 shots were in the small cluster. Then I got some flyers verticle and one right. Box test, 10 L, 20 D, 10 R, 20 U. Shot 2 rounds. 1 in the little cluster, 1 up higher. Adjusted sights .5moa down, .5 moa left Shot two, lower left diamond. Called it day. Today, on the way home I shot a 5 shot group that was mediocre, but center and a little left. Not horrible but OK. Box tested and the last shot was low. I will post that picture in a minute. NOW, I pulled the scope off tonight and noted the first two screws were slightly loose, by that I mean I could turn each .25 to .5 turns. This is a 1 piece aluminum rail. Another thing that is bugging me is that the parallax does nothing on this scope at 5.5 power and if I am looking a wall in the house 20 feet away I can not get a clear picture. Is that normal?