I believe the best use of visualization is when you're not getting ready to shoot an arrow. The story of the POW in Vietnam comes to mind, where he would play18 holes of golf in his mind, fairly often, with the result that his actual golf game improved when he returned to the United States.
I think the problem when you visualize something right before you shoot is that you are putting your mind into a conceptual mode of thinking in a reality that is either in the future or in some undefined place in space and time. You can't hit something in the future, only in the here and now.
I commonly get into this frame of mind when I shoot my first 3 arrows out of four into the bullseye, and imagine how great it would be if I shoot the 4th one into the bullseye too. If I can't get myself back into the here and now before I make that 4th shot, it's probably not going into the bullseye, because a part of my concentration is being used to support a concept that isn't real, at least not yet.