Well, I have seen 1 take-down 303 it was a commercial sporter made between the wars flush mount magazine and beautiful finishing. Had nice smooth barrel with qaulity sporting sights. It took between the barrel and receiver the forend was quick release and then the barrel unscrewed with the interupted screw style. It was very traditional, very cool. It was at an online auction dont know if you could find one again.
-TC-