Rifled Muzzle Loading howitzers were selected by the Royal Artillery in the 1870s to replace obsolete smooth bore Mortars and howitzers, as they had great range and accuracy.

The 6.6-inch Howitzer was used a semi-mobile siege artillery, so could be mounted on a travelling siege carriage with limber.
In addition a limbered ammunition trailer was also deployed with each gun.
Alternatively the howitzer could be mounted on fixed bed and ground platform.
Numbers of howitzers were mounted in fixed defences, including Fort Widley and Fort Nelson, Portsmouth which in 1898 show a number mounted.

By 1902 the Howitzer was declared obsolete and removed from service.
Rifled Muzzle Loading howitzers were selected by the Royal Artillery in the 1870s to replace obsolete smooth bore Mortars and howitzers, as they had great range and accuracy.
The 6.6-inch Howitzer was used a semi-mobile siege artillery, so could be mounted on a travelling siege carriage with limber. In addition a limbered ammunition trailer was also deployed with each gun. Alternatively the howitzer could be mounted on fixed bed and ground platform. Numbers of howitzers were mounted in fixed defences, including Fort Widley and Fort Nelson, Portsmouth which in 1898 show a number mounted.
By 1902 the Howitzer was declared obsolete and removed from service.
RML 6.6-inch howitzer