Which aged Overproof rums do you have?

I bought Pusser's Gunpowder and found a definition of the world "proof". So as Vomi tested, around 50% abv could be the ignition limit (and the gunpowder might have been used just to start the fire, to see if the grog catches up). I think that's another topic for investigation, just let me think how to get the gunpowder. The story on the label is closer to the one told by Captain Lee, so the spirit for sailors was rather a strong cocktail by that time.