Smooth Ambler Founders Cask Strength 5 Year Rye Series Batch 2 - Smooth Ambler Founders Cask Strength 5 Year Rye Series Batch 2 is bottled at cask-strength which reflects the exact barrel proof of the distinct cask in which the whiskey was aged. A fine, curated rye, bottled at 56.2% ABV, aged 5 years.