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BL 6 inch 30 cwt Howitzer
With breech open, circa. 1900
Type Medium howitzer
Place of origin United Kingdom United Kingdom
Service history
In service 1896 - 1918
Wars Second Boer War
World War I
Greco-Turkish War (1919–1922)
Production history
Number built 120
Crew 10

Shell Lyddite : 122 lb 9 oz (55.59 kg),[1] later 100 lb (45.36 kg);[2]
Shrapnel : 100 lb (45.36 kg)
Calibre 6-inch (152.4 mm)
Recoil Hydro spring, 18 inch[3]
Carriage Wheeled, box trail
Elevation -10° - 35° (wheeled carriage)
35° - 70° (siege mount)[3]
Muzzle velocity 777 ft/s (237 m/s) [3]
Maximum range 5,200 yds (122lb 9oz shell, on wheeled travelling carriage); 7,000 yds (122lb 9oz shell, on siege mounting)
7,000 yards (100 lb shell, on wheeled travelling carriage)[4]

The Ordnance BL 6 inch 30cwt howitzer was a British medium howitzer used in the Second Boer War and early in World War I. The qualifier "30cwt" refers to the weight of the barrel and breech together which weighed 30 hundredweight (cwt) : 30 x 112 lb = 3360 lb. It can be identified by the slightly flared shape of the muzzle and large recuperator springs below the barrel.


Introduced 1896, based on an Indian Army design.

Its original shell was 122 lb 9 oz Lyddite explosive. In 1901 a lighter 100 lb (45 kg) shell was introduced which increased maximum range when firing from its wheeled travelling carriage to 7000 yards.[5] These were then referred to as the "heavy" and "light" shell respectively. A 100 lb shrapnel shell was also available.

It was phased out and replaced by 6 inch 26 cwt howitzer from late 1915 onwards.

Combat use

On siege mounting

This gun was designed as a siege howitzer firing a special 122 pounds 9 ounces (55.59 kg) howitzer shell. It was designed to be fired from a static siege platform, with wheels removed, for accurate long-range shooting. When fired mounted on its normal wheeled travelling carriage, which had become standard practice for modern medium artillery, its range and accuracy diminished due to limited elevation and also lack of a modern recoil mechanism.

Second Boer War

In South Africa, Second Boer War

12 Guns were employed in South Africa in the Second Boer War as part of the British siege train. It was during this campaign that the short range limitation became evident, and shell weight was traded for greater range in 1901 with the introduction of a "light" 100 pounds (45.36 kg) shell which increased maximum range when firing from its wheeled travelling carriage to 7000 yards. No use was found for the siege platform which allowed elevation to 70° : "This capability was designed for distinct siege operation, and in South Africa the need for this did not arise. In this theatre the platform was an encumbrance, and it was discovered that it could be dispensed with".[5]

World War I

Gun landing at Anzac Cove, Gallipoli, 1915

When World War I began approximately 80 guns were still available. They constituted the only true heavy artillery the British army possessed, and were heavily engaged in the early battles in France and Flanders. It was adapted to use the standard 100 pounds (45.36 kg) gun shell, with a slight enlargement of the chamber to produce Mk I*, allowing slightly larger propellant charges.[6] It served in all theatres, including the Western Front, until replaced by the modern 6 inch 26 cwt howitzer from late 1915. However, Gallipoli was given low priority for modern ordnance and the 6 inch 30 cwt was used by 14th Siege Battery RGA (4 guns), attached to 29th Division, at Helles, and by the Australian 1st Heavy Artillery Battery (2 guns from the Royal Malta Artillery, crewed by the Royal Marine Artillery, which arrived in May[7]) at Anzac.

Greco-Turkish War (1919–1922)

Gun in Greek service during the war against Turkey

Judging by official Greek photographs and text, at least one howitzer was deployed by Greece during the Greco-Turkish War of 1919 – 1922.

World War I ammunition

BL 6inch 30cwt Howitzer Charge 2lb 8.5oz Diagram.jpg
BL 6 inch Howitzer Shrapnel Shell Mk I Light.jpg
2 lb 8½ oz cordite cartridge for "light" (100 lb) shell, showing arrangement of cordite rings around central core.
One or more rings were removed for shorter ranges.
Lyddite shell
No 17 D.A. percussion fuze for lydditte shells
Star shell
Mk IX 100 lb Shrapnel shell for gun or howitzer (1 inch G.S. fuze gauge)
Mk I 100 lb "light" shrapnel shell for howitzer (2 inch fuze gauge)
Mk IV T friction tube


See also

Weapons of comparable role, performance and era

Surviving examples

Gun at Imperial War Museum Duxford

Gun at the War Museum, Salonica, Greece

Notes and references

  1. Text Book of Gunnery 1902, Table XII Page 336
  2. Treatise on Ammunition, 10th Edition, 1915
  3. 3.0 3.1 3.2 Hogg & Thurston 1972, page 125
  4. Clarke 2005, page 20
  5. 5.0 5.1 Hall June 1972
  6. Treatise on Ammunition, 1915. Page 95. War Office.
  7. CEW Bean,"THE OFFICIAL HISTORY OF AUSTRALIA IN THE WAR OF 1914-1918 Volume II" page 80. 11th Edition, published by Angus & Robertson, Sydney, 1941


External links

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