qwerty2008,
Congratulations on the new rifle. In America any cartridge of greater bore diameter than a .338 Winchester Magnum is effectively a big bore.
Strictly speaking in African hunting a thirty calibre and below are small bores. Up to fourty calibre is a medium bore. Above that are large bore cartridges.
Warning: someone here will want to argue over this just for the sake of arguing. Good luck with the new gun!
