...One potential explanation, I guess, is winding "down," I can feel resistance from the spring, winding up, I can feel it loosening. I have tried "overshooting" by clicks and winding back to the desired adjustment, with no difference in the result....
Quote from: TwiceHorn on March 14, 2017, 04:08:41 PM...One potential explanation, I guess, is winding "down," I can feel resistance from the spring, winding up, I can feel it loosening. I have tried "overshooting" by clicks and winding back to the desired adjustment, with no difference in the result....If I feel any significant resistance (tightening), I won't run the scope that far as it's less likely to give you a reliable reading. You probably don't want to run it too loose either.From mechanical center, I usually get about 2-1/2 turns on Leapers 1/4" click scopes. I try to leave at least 1/2 turn of margin (I prefer a full turn). That leaves me with about +/-2 turns of usable turret adjustment. Even safer to keep it to +/-1.5 turns.I use holdover rather than clicking, so not as much of an issue in my case.
I would guess it is a simple geometry problem. If I understand scopes correctly, the turret is tilting an optical sub-assembly inside the scope via what amounts to a screw jack. When that sub-assembly is dead on parallel to the optical tube, up and down should have nearly equal effects, except for possibly some variation due to how it is connected inside. However, it is nonlinear: 50 clicks up isn't worth just twice what 25 clicks up got you. And if you aren't starting from dead-on parallel, you are already on that curve somewhere. Think of it like pitch on a roof or grade of a slope or even sine error (not sign).Can you (or someone else) do the test again, but this time add an additional test point either between or past what you did first so we get "zero" and four other points, two up and two down? If you plot the results you should be able to predict where that "dead on" parallel point is, as well as see what is going on. (If you just get the data and post the numbers, me or someone else reading this can plot and do some analysis for you if you don't have access to a spreadsheet.)