My shooting distance varies quite a lot - mainly dependent on recency of last ejaculation and current level of stimulation. Somewhere between navel and over shoulder (not across room). I find the foreskin question odd since my foreskin has never been actively involved in a first shot.
I have met guys who don't retract their foreskins when they masturbate - they kind of massage the head with the foreskin (as you would do if you had phimosis). I move mine back and forth, usually rolling/stretching it as far back as it will go at some point during masturbation, although shooting time is usually about stroking the base of the head with the foreskin, with the hole exposed an unimpeded.
I will speculate based on the question that your foreskin is kind of tight or long, and doesn't roll back easily over the head. If so, read the threads on stretching a foreskin. It's a lot more fun when you can roll it back easily.