Actually I think you may have hit it right on the nail without realizing so. Exactly how many 1A schools are there in Charlotte that are 1A? If more than one, then how many are not charters?
Twenty five mile radius correct? How large are the city limits of Charlotte? Also I believe the lottery is only used when a class, say freshman, would be overcrowded if all applicants were accepted? Is that correct as well?
So if a coach was smart, and had the cooperation of the administration, a class could, in theory, always ensure that enough spots would be available for any players that could possibly help his team?
In theory of course