A higher strength rum from Australia's Bundaberg. the name "Overproof" refers to an archaic means of tasting the strength of a spirit. In the days of yore, gunpowder would be saturated with the spirit. If the powder did not flash when lit, it was deemed "underproof", if it flashed, it was "overproof". Instead, more technical tools are used to measure the proof these days, and anything over 50% abv is deemed overproof. This has more of the Bundy character in it, thanks to the extra potency.