Well if the mounting system doesn't have adjustments, you could use it like ghost rings and practice with it so you know where the POI is vs POA. After the first shot, instinctively the follow up should ring home. If you have a place to shoot, set up a chunk of cardboard, at least 25 yards out (can be interpolated to distance) and see where it prints with the Red Dot off. That should give you an eye ball where your minute of pie plate lives. I like ghost rings with my poor eyesight, PAX