Assuming your scope has 1/4 MOA clicks, and unless my maths is wrong, at 33 1/3 yards one click will move the POI 2.1mm. So if you're 2.1mm off on the horizontal, one click would bring it bang on. So you must only be 1mm off, and one click moves it 1mm in the other direction? So you're shooting a group that you can tell is 1mm off to one side, or have I misunderstood?