hey everybody i'm looking for a different stock for my stevens 200 but what i can't seem to find information about is the barrel, when i search my serial number this is what comes up for the barrel "BBL 7mm08/22SP" my question is what is BBL mean? Blue barrel or Bull Barrel? and what does SP stand for as well ? my rifle has been re-barreled for a 260 rem but still wonder what those letter codes mean ?