Castle & Key Single Barrel Bourbon

High-Proof / Barrel-Proof Whiskey

Bottled at or near its barrel-entry strength, with no or minimal water added; concentrated flavor and higher perceived heat.

Bottled at, or close to, the proof it actually comes out of the barrel at -- little or no water added before bottling. That means more of the barrel's own character reaches the glass undiluted, at the cost of a proof that can run well past standard bottling strength. See Rickhouse Science for how barrel placement and time change what's actually in that barrel to begin with, and the Proof & Dilution Calculator for what cutting a barrel-proof pour down actually does to it.

Single Barrel

Whiskey drawn and bottled from one individual cask rather than mingled across many; a bottling method, not a mash bill or flavor profile of its own.

A bottling choice, not a production step upstream of it -- the whiskey ages and is distilled the same way as the distillery's other releases, then gets pulled from one specific barrel rather than blended with others before bottling. Bottle matches here come from a bottle's own name explicitly naming it a single barrel release, not an independent barrel-count field -- see this style's own Explore Bottles section for that caveat. See Rickhouse Science for how a barrel's own floor level and rick location can make one single barrel taste different from its neighbors.

Proof