Can you explain your process to set the diopter? I'd recommend setting magnification on the lowest setting but still be able to see the reticle detail instead of setting it at max magnification, then set according to the PSA on diopters in the sticky. I have that with my eyesight I always need to fine tune my diopter, my eyes adjust way too quickly or something but using the "normal" manufacturer's recommendations usually does not get my diopter quite right.