Pusser's Rum Gunpowder Spiced Rum

Prior to the introduction of the Sikes Hydrometer, in 1816, the ship ’s Purser, or ’Pusser ’, tested the strength of the daily issue by mixing neat rum, with a little water, to which was added a few gunpowder grains. When the mixture was heated through a burning glass, the gunpowder ignited, and the rum was served at that strength. When the method was tested by hydrometer, it was found to be 109% proof {54.5% ABV}. Consequently, the Pusser ’s rum remained at ’Gunpowder ’ strength, 109% Proof, until the daily issue was terminated, on 31st July 1970, known as Black Tot Day.