DeepWoodsHunter.. I used to shoot both eyes open but now I really concentrate on keeping my left eye closed. And I think that is a part of the problem shooting long distances because short range I shoot both eyes open and I am under 1 MOA, but anything over 30, I think I concentrate so much on keeping my left eye closed that I lose concentration on aiming. I know it may seem that keeping that eye closed isn't a big deal but when it comes to pulling a trigger, that left eye wants to be in on the action.