Shooting an Enfield with 356 Ammo

Hey guys! If you have an old Enfield rifle that was rechambered for the 356 round that was popular after WWII, can you still use the 303 standard bolt in the action? And will the 356 round still fit in the 10 rnd box magazine? Sorry for all the questions but my father always said if I would have asked more questions, I wouldn't be married now! [:p]