I suspect that it's the other direction that give most people a problem...
Unless you mean going to an open gun for the first time. In which case most shooters who have not developed their index or NPA will have a hard time adjusting, but chances are they were not that great at picking up their irons either...if you know what to look for on either platform, irons or dot, you can quickly get on site if you come up wrong.





























......there's no coming back from open for me.
























