My strong advice would be for a player to call himself a SS for as long as possible. Coaches always believe that a SS can be moved to any position.
My son has a teammate who was a SS through 13U. At 14U he started splitting time equally between SS, 2B and 3B. As a 10th grader he was exclusively a 2B. As an 11th grader he was exclusively at 3B. Yet in PG and PBR lists he is listed as a SS.