I have tried the double tap route mentioned above and it works to some degree. Once you have done this test, I would pay attenntion to the dot. Does it goes up and down and does it move around? I think that a predictable dot is more important esp if it goes straight up and down and stay within the lens. When I did this, I selected a lower pundage recoil spring and then found that the dot was not predictable. I went up a pound in spring weight and have kept that.