During the Second Boer War the guns were deployed as field guns and siege guns at Vaal Krantz, Ladysmith, Mafeking, Kimberley and Bergendal. During the early stages of the war these guns gave the Boers an advantage as they had longer range than any British guns that were deployed in South Africa at the time. After all their ammunition had been expended, the guns were destroyed one by one, to prevent them from falling into British hands.