"70cl / 57.0% - Professor Cornelius Ampleforth took his famous Rumbullion. and bottled it at Navy Strength to create a much much bigger drink. This is a warming concoction that would no doubt give a sailor vim and vigour on a stormy night. Rumbullion. Navy Strength is made using a secret recipe with a Caribbean rum at its spicy core. Expect big spicy flavours of cardamom, clove and vanilla in this legendary spiced rum. Navy Strength is 57%abv, the reason for this, allegedly, was that gunpowder would still explode if alcohol at this strength was accidentally spilt on it. However the Professor conducted an experiment to see if it really would still explode, the results were recorded in this video..."