RML 11 inch 25 ton gun

RML 11 inch 25 ton guns were large rifled muzzle-loading guns used as primary armament on British battleships and for coastal defence. They were effectively the same gun as the RML 12 inch 25 ton gun, bored to 11 inches instead of 12.

Design
Mark I was introduced in 1867. Mark II was introduced in 1871 using the simpler and cheaper "Fraser" gun construction method which had proved successful with the RML 9 inch 12 ton Mk IV gun.

Naval service
Guns were mounted on :
 * HMS Alexandra, commissioned 1877.
 * HMS Temeraire, commissioned 1877.

Ammunition
The gun's primary projectile was 536 - 543 pound "Palliser" armour-piercing shot, which were fired with a "Battering charge" of 85 pounds of "P" (gunpowder) or 70 pounds of "R.L.G." (gunpowder) for maximum velocity and hence penetrating power. Shrapnel and Common (exploding) shells weighed 532 - 536 pounds and were fired with a "Full charge" of 60 pounds "P" or 50 pounds "R.L.G.".

Surviving examples

 * A Mark II gun at Fort Nelson, Portsmouth, UK
 * At Fort George, Bermuda :