Actually, speaking from the fact that I've picked more 5200s than I can remember and that I have over 30+ pinned and keyed cores for them on hand right now, the American 5200 is only capable of being pinned for 5 pin stacks due to its core depth. It's counterparts, the American 1100 and 1200 series locks, have deeper cores and can take 6 pin stacks but is usually only pinned for 5 unless special ordered.
When creating a bump key for the 5200, I suggest making multiple keys and rotating them out after 2 or 3 tries of unsuccessful bumping. I normally have about 4 bump keys for these locks with me as I deal with them regularly at work, and usually only get through 2 before the lock opens. Rotating the bump keys also helps extend the life of the bump keys. But for me, considering I can pick most of them open in the same amount of time it take to bump it open, I usually just pick them anyway, most of the time just to make the point that I can pick them.