FWIW, I found that widening the notch in the rear sight allowed me to look THROUGH and OVER that sight, to focus on the front sight, rather than stealing glimpses of the rear sight, and wearing my eye muscles out! You might consider opening that rear sight notch.
I like to see the muzzle flash in front of and on the sides of that front sight when my gun fires. If I focus on that front sight, and don't blink( flinch) I see the front sight positioned on my target, so that I can call the shot- tell myself if the shot is going to hit the 10 ring, or be off in some direction. Eventually I learn how much off center my shot will be, in addition to which direction. A Called shot is as good as a perfect shot, because you know what you did wrong. Eventually, practice will get you shooting smaller and smaller errors, and eventually you will be shooting "X's".
Yes, everyone blinks. Its a question of When, not IF. If you blink uncontrollably, its a "flinch". You eye has its own autonomous nervous system program to protect it from Perceived Dangers. It doesn't not reprogram that system automatically to take into account you are wearing protective lenses. YOU have to consciously teach it the difference between Perceived and Real Dangers. That takes concentration, effort( practice) and time.
For instance. My brother took a full year, shooting once a week, and doing dry fire practices at home, before he began to shoot small groups with his flintlock on the order that he shot groups with his cap and ball guns.
There is an UP side( GOOD NEWS) to this story, however. Once you learn to focus on that front sight and call your shots, seeing the muzzle flash and smoke before the barrel rises in recoil, ( AND ignoring that flash in the pan), you will find that your "Follow-through" with every other rifle you shoot will be vastly improved. The Smaller groups you will shoot, even with modern rifles, will amaze you. Honest. :shocked2: :blah: :grin: :grin: :thumbsup: