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Ordnance QF 6 inch gun Mk XXII
HMS Rodney 6 inch gun turrets IWM A 95.jpg
Gun turrets on HMS Rodney, 1940
Type Naval gun
Service history
In service 1927 - 1947
Used by  Royal Navy
Wars World War II
Barrel length 300 inches (7.620 m) bore (50 calibres)

Shell 1927 : 100 pounds (45 kg)
1942 : 112 pounds (51 kg)[1]
Calibre 6-inch (152.4 mm)
Breech Welin interrupted screw
Muzzle velocity 898 metres per second (2,950 ft/s)[1]

The BL 6-inch Mk XXII gun[2] was a British high-velocity 6-inch 50-calibre wire-wound naval gun used as secondary armament on the two Nelson-class battleships, serving throughout World War II.


The gun originally fired a 100-pound (45 kg) shell, which had been the standard shell weight for six-inch guns since 1880. From 1942 the gun fired the same 112-pound (51 kg) shell introduced for the later Mk XXIII gun.[3]


  1. 1.0 1.1
  2. MK XXII = Mark 22. Britain used Roman numerals to denote Marks (models) of ordnance until after World War II. This was the twenty-second model of British BL 6-inch gun
  3. DiGiulian

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