68-pounder Lancaster guns were a British rifled muzzle-loading cannon of the 1850s that fired a 68-pound shell.[1] It was designed by Charles William Lancaster.[2] The cannon was designed with an oval bore and had a range of about 6,500 yd (5.9 km).[3] The gun had a tendency to burst and jam.[4][2]
They were fitted in pairs to the Arrow-class gunvessel and were used during the Crimean War.[1][2]
The muzzle of a Lancaster gun survives in the collection of the Royal Armouries at Fort Nelson.[2]