I found this in" the Set and maintaining it":
"I’ve had this experience many times and have talked to other shooters who also have had it, that upon completion of an extremely successful course of fire, you cannot remember what thoughts you had. It’s a natural tendency to want to think back and know what you did or what you were thinking to control such a good performance, but it’s that lack of thoughts that produces that lack of memory.
The lack of memory is the result of being in the set. By putting yourself in the most favorable condition to allow the ultimate expression of your capacity, that condition has very little to do with thought, so there is very little memory associated with it. So the bottom line really isn’t a bottom line; it’s that your attention always has to be attentive. It can never park itself in one place or get comfortable in one place, because that will only last for so long before the trick wears off.
The desire to remember what we were thinking as we were performing impeccably, when in fact there is nothing to remember, imposes a sense of uncertainty or fear in the mind. Enter trust. Through experience, we must learn to trust that if we maintain a state of conscious awareness and simply witness what is actually happening, the aforementioned topics will manifest themselves to your capacity."
What I believe is happening is you are letting your subconcious make the shot. By giving your concious mind something to do, you keep it busy, and let your highly trained, never forgets anything, subconcious make the shot.
Coool!!!!