Thanks for the responses and help.
Has anyone set the center of the donut for zero at a 100yds or so? I know what I'm going to do when I engage targets quickly that are closer than that...............I will put the center of the donut right where I expect to hit! If I set it up for center @ 100yds will I be able to acurately use the other crosshair lines? Just curious. This scope will be on a flattop.