 The guns could initially be depressed to −8° and elevated to 13.5°, although the turrets were later modified to allow −5.5° depression and 16° of elevation.The guns fired projectiles at a muzzle velocity of ; at 13.5°, this provided a maximum range of , and with the upgraded 16° elevation, the range was extended to .The guns had a total of 1,020 rounds for 85 shells per gun.