Overproof Rum
Overproof rum is rum bottled far stronger than the usual 40%, from about 57% up to 75.5%. The name means stronger than proof, the old British strength line of 57.14% ABV. Our recipes take Jamaican white overproof at 63% in measures of 15 to 45ml, and it is the strongest and most flammable bottle on a home bar.
Quick Facts
Store sealed at room temperature away from direct sunlight. Ensure bottles are clearly labelled due to high alcohol strength. In our experience it is stable once opened.
None of the 14 listed allergens.
About Overproof Rum
Flavour Profile
Primary Flavours
Tasting Notes
Powerful and aromatic with intense alcohol heat, bold molasses sweetness, ripe tropical fruit, and pronounced estery notes depending on origin and production style.
Proof was a gunpowder test that became a number
The story goes, as Difford’s Guide tells it, that pursers in the British navy tested their rum by adding a few grains of gunpowder and focusing the sun’s heat on it through a magnifying glass: if it just ignited, the rum was at proof, and if it would not light, it was under. The test was crude. Bartholomew Sikes’s hydrometer, adopted into law in 1818, replaced it, and on his scale 100 proof came to mean 57.14% ABV. Britain switched to ABV at the start of 1980, but overproof still means stronger than that old line.
Our recipes use two strengths
Rum strengths and where our recipes use them; the floor from the retained Regulation (EC) 110/2008, Annex II, the 54.5% and 63% from Pusser’s and Wray & Nephew’s own sites, 100 proof from Difford’s Guide, a secondary source, and US proof from 26 U.S. Code § 5002.
37.5 to 40%
- What it is
- Standard rum; 37.5% is the legal minimum
- In our recipes
- Most rum lines
54.5%
- What it is
- Navy-style strength
- In our recipes
- Not specified
57.14%
- What it is
- British 100 proof
- In our recipes
- Not specified
63%
- What it is
- Jamaican white overproof
- In our recipes
- Rum Runner, Bahama Mama, Nuclear Daiquiri, Reggae Rum Punch, Illegal
75.5%
- What it is
- Demerara overproof (US 151 proof)
- In our recipes
- Jet Pilot
| Strength | What it is | In our recipes |
|---|---|---|
| 37.5 to 40% | Standard rum; 37.5% is the legal minimum | Most rum lines |
| 54.5% | Navy-style strength | Not specified |
| 57.14% | British 100 proof | Not specified |
| 63% | Jamaican white overproof | Rum Runner, Bahama Mama, Nuclear Daiquiri, Reggae Rum Punch, Illegal |
| 75.5% | Demerara overproof (US 151 proof) | Jet Pilot |
Jamaican white overproof is unaged and full of fruity esters; it floats on top of the Rum Runner for aroma and is the backbone of the Nuclear Daiquiri, where 25ml stands up to green Chartreuse. The Jet Pilot uses 22.5ml of a 75.5% Demerara, and its units are worked out at 75.5%.
Small measures carry a whole drink
At 63%, 15ml holds almost as much alcohol as 25ml of a standard rum, and much more aroma. That is why it appears in 15 to 45ml measures, usually beside a standard rum: the Bahama Mama shakes 15ml in with dark and coconut rum, and the Reggae Rum Punch is the one drink that leads with 45ml.
Keep it away from flame
High-strength spirit gives off vapour that catches light easily, and an alcohol flame is pale and hard to see in daylight. Close the bottle before anything is lit, never pour near a flame, and do not set drinks alight at home.
Using Overproof Rum
Usage
15ml floated on the Rum Runner (optional) and shaken into the Bahama Mama, 25ml in the Nuclear Daiquiri, 45ml in the Reggae Rum Punch, and 22.5ml of 75.5% Demerara overproof in the Jet Pilot. Measure it precisely: each 15ml of 63% rum is nearly a unit.
Pro Tip
To float overproof, let it run off a spoon held just over the drink. Do not light it: a burning float is hard to see in daylight, and the glass, the rum and the garnish all get hot.
Top Tips
- Use a jigger, never a free pour. At 63%, 15ml carries almost as much alcohol as 25ml of a standard rum.
- Keep the bottle well away from candles, hobs and anything lit. Close it before you strike a match.
- Float it slowly over the back of a bar spoon when a recipe floats it, so the first sips carry its aroma.
- Read which overproof a recipe means. A 63% Jamaican white and a 75.5% Demerara are different ingredients.
Possible Substitutions
- Blend of dark rum and high-ester rum (reduced intensity)
- Standard rum with additional bitters (approximate effect)
Production Method
Produced by distilling rum to a higher strength and bottling with minimal dilution. Some styles emphasise high ester content through fermentation and pot-still distillation.
History & Context
Difford’s Guide, a secondary source, says that, as legend has it, pursers in the British navy tested their rum with a few grains of gunpowder and the sun’s heat focused through a magnifying glass: if the mixture just ignited, it was proof. Difford’s dates Bartholomew Sikes’s hydrometer to 1816 and its adoption into law to 1818, with 100 proof at 57.142857% ABV. The Alcoholic Liquors Order 1979 moved Britain to ABV from January 1980.
More to explore
Common Questions
What is overproof rum?
What does overproof mean?
What is proof rum?
How do you use overproof rum safely?
Can I use standard rum instead of overproof?
How strong is Wray & Nephew overproof?
Does overproof rum go off?
Sources.
Checked between 16 October and 19 October 2026.
- legislation.gov.uk, “Regulation (EC) No 110/2008, Annex II (as retained in UK law)”.
- Wray & Nephew, “Wray & Nephew White Overproof Rum”.
- Pusser’s, “Gunpowder Proof” (producer’s shop listing).
- legislation.gov.uk, “The Alcoholic Liquors (Amendment of Enactments Relating to Strength and to Units of Measurement) Order 1979”.
- Cornell Law School LII, “26 U.S. Code § 5002, Definitions”.
- Difford’s Guide, “Overproof & Navy Strength” (secondary source: Sikes’s hydrometer invented 1816, adopted into law 1818; 100 proof is four sevenths alcohol by volume (57.142857%); the gunpowder legend; the true navy strength 54.5%).
Made with Overproof Rum
Featured In These Cocktails
Often Used With
Updated 19 October 2026