The RML 25-pounder gun was a British rifled muzzle-loading light

siege gun Siege artillery (also siege guns or siege cannons) are heavy guns designed to bombard fortifications, cities, and other fixed targets. They are distinct from field artillery and are a class of siege weapon capable of firing heavy cannonballs o ...

and gun of position designed in 1871. It was intended to be an intermediate gun between the 16-pounder and 40-pounder Rifled Muzzle Loading guns. It was part of a series of guns designed after the British military reverted to rifled muzzle-loading artillery until a more satisfactory breech-loading system than that of the

Armstrong gun An Armstrong gun was a uniquely designed type of rifled breech-loading field and heavy gun designed by Sir William Armstrong and manufactured in England beginning in 1855 by the Elswick Ordnance Company and the Royal Arsenal at Woolwich. Such g ...

s was developed.

Description

The gun consisted of a central toughened steel "A" tube surrounded by two

wrought-iron Wrought iron is an iron alloy with a very low carbon content (less than 0.08%) in contrast to that of cast iron (2.1% to 4%). It is a semi-fused mass of iron with fibrous slag inclusions (up to 2% by weight), which give it a wood-like "grain" t ...

coils. Rifling was the "Woolwich" pattern of three broad grooves, with a uniform twist of 1 turn in 35 calibres (i.e. in 166.25 inches). They were mounted on semi-mobile field carriages, with limbers which enabled them to be moved and mounted in either field

fortification A fortification is a military construction or building designed for the defense of territories in warfare, and is also used to establish rule in a region during peacetime. The term is derived from Latin ''fortis'' ("strong") and ''facere' ...

s or permanent fortifications. The guns used black powder charges in silk bags to fire three types of ammunition – common shell, shrapnel shell or case shot. A copper vent towards the end of the bore of the gun enabled friction tubes to be used to fire the gun.

Service use

Six 25-pounder RML guns were transported from Malta and landed in Egypt in 1882 as part of a

Royal Artillery The Royal Regiment of Artillery, commonly referred to as the Royal Artillery (RA) and colloquially known as "The Gunners", is one of two regiments that make up the artillery arm of the British Army. The Royal Regiment of Artillery comprises t ...

Siege train formed for the

Anglo-Egyptian War The British conquest of Egypt (1882), also known as Anglo-Egyptian War (), occurred in 1882 between Egyptian and Sudanese forces under Ahmed ‘Urabi and the United Kingdom. It ended a nationalist uprising against the Khedive Tewfik Pasha. It ...

, however none of them were deployed in action. The guns were also deployed at Forts and Batteries around Great Britain to form part of the fixed defences. Some were located at

Fort Cumberland A fortification is a military construction or building designed for the defense of territories in warfare, and is also used to establish rule in a region during peacetime. The term is derived from Latin ''fortis'' ("strong") and ''facere'' ...

where they were used for training by the

Royal Marine Artillery The history of the Royal Marines began on 28 October 1664 with the formation of the Duke of York and Albany's Maritime Regiment of Foot soon becoming known as the Admiral's Regiment. During the War of the Spanish Succession the most historic achi ...

.Robinson, Charles N, Cdr RN, ''Navy and Army Illustrated'', Hudson & Kearns, 21 August 1896, p84 They remained in service until 1902, by which time most had been dismounted and scrapped. A heavily rusted example is displayed at

Fort Brockhurst Fort Brockhurst is one of the Palmerston Forts, in Gosport, England, and a Scheduled Ancient Monument. It is now an English Heritage property. History Construction, 1858–1862 Fort Brockhurst was designed by William Crossman in the 19th ce ...

in Hampshire.

Notes and references

Bibliography

Treatise on the Construction and Manufacture of Ordnance in the British Service. War Office, UK, 1877

Text Book of Gunnery, 1887. LONDON : PRINTED FOR HIS MAJESTY'S STATIONERY OFFICE, BY HARRISON AND SONS, ST. MARTIN'S LANE
{{Use dmy dates, date=June 2017 Artillery of the United Kingdom