Vangulil,
I'm with you. I close my other eye when shooting all the time. Rifles and shotguns left eye closed, hand gun right handed, right eye closed. I don't like bragging but talk to my hunting buddies, I take my fair share of the game and usually run 22-23 in trap. Most fun is repeatedly taking 3 decoying geese with 2 rounds. I think the sleepy eye opens a bit when looking for the crossing geese.

Nothing is foolproof to a sufficiently talented fool.