MODULE 08 · 9 MIN
Barrel, Hogshead, Butt, Fill History and Finishing
A barrel is commonly around 200 litres, a hogshead around 225–250 litres and a butt around 500 litres, though real capacities vary. Smaller casks offer more wood surface per litre and can act faster, but speed alone does not guarantee balance.
First-fill casks are being used for Scotch for the first time after their previous contents and are often more active. Refill casks have already matured Scotch and may preserve more distillery character. Finishing moves whisky to another cask for an additional period; it differs from full-term maturation.
Key ideas
Cask capacities are conventions, not perfectly fixed sizes.
Refill can be a deliberate spirit-led choice.
A finish is an additional maturation stage.
Glossary
- First fill
- First use for Scotch after the cask’s previous contents.
- Finish
- An additional maturation period in a different cask.
Three-question self-check
Pause before moving on.
1. Can you explain: Cask capacities are conventions, not perfectly fixed sizes.
Cask capacities are conventions, not perfectly fixed sizes.
2. Can you connect: Refill can be a deliberate spirit-led choice.
Refill can be a deliberate spirit-led choice.
3. Can you define “First fill” in your own words?
A finish is an additional maturation stage.
Sources & further reading
- SWA — Allowable casks for maturationScotch Whisky Association
- SWA — Scotch Whisky FAQsScotch Whisky Association
Last reviewed: 2026-08-09