You loose your depth perception when you close one eye. That might not be such a big deal in a standardized regiment such as skeet or trap, where you've seen the presentations before.It can cause trouble on something like sporting clays or actual field shooting where range determination is important to leed and everyshot is a little different.

Pawildman touched on an important issue, rythym and/or consistancy,getting into your "grove" and staying there is the most important aspect of wing shooting for me. I have a little ritual that I perform before each series of shots, nothing I do is really important to the actual shot, but it helps me concentrate and get my mind right.

Doug