Single Barrel & Cask Strength Bare Knuckle High Rye Bourbon is available in Single Barrel & Cask Strength. Both of these expressions are carefully selected from an individual barrel, handpicked for its superior taste and quality. Bare Knuckle High Rye Bourbon Cask Strength is bottled directly from the barrel, without dilution. This spirit can range from ~120 to ~128 proof and produces a wonderful depth of flavor and heat.