For many years, I shot with both eyes open, until the butt hit my shoulder, and then closed the left eye. (I always shoot "low gun" because I'm more interested in practicing actual hunting shots then worrying about any scores. And I've NEVER had a pre-mounted gun while hunting.) Shooting in this fashion, I actually shot pretty good and went to "B" class easily, shooting registered sporting clays. Then, after adjusting all my guns to a proper "fit", I started shooting with both eyes open, all thru the shooting process. Should have done that years sooner. Although I haven't registed w/ the NSCA for a few years, I still shoot in many of the tournaments, in hunter class. My scores are as good as those in the AA class and I figure that's plenty good, as I'm still shooting from the low gun position, while everyone else shoots pre-mounted. Shooting with both eyes open allows a better view of the shooting field and a clearer view of the expected target, be it clays or a duck hunting situation.
"Listen to those Whispering Wings"