Cookieman,
My 20 GA Tracker II barrel is stamped "PARDNER TRACKER II SB1 20 GA 3" CYL BORE", it is a RIFLED BORE.
My 20 GA USH barrel is stamped "ULTRA" SLUG HUNTER 20 GA 3" RIFLED BORE, and is of course, RIFLED.
So, my take is if it is stamped "TRACKER II", it will be rifled. If it is stamped "TRACKER" (as in TRACKER I), it will be a smooth bore. Even though both are marked CYL BORE.