All terms
Distillery glossary
Barrel Proof
Barrel proof (or cask strength) describes whiskey bottled at or near the proof at which it came out of the barrel, with no water added to bring it down to a standard bottling proof.
Because spirit gains or loses proof during aging depending on warehouse conditions, barrel-proof bottlings vary batch to batch and are typically well above 100 proof. Bottling at barrel proof requires an accurate regauge at dump so the label proof matches the measured contents. The dump proof also drives the proof-gallon math for tax.
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