Jack Daniel's Single Barrel Barrel Proof 131.2 2015 ReleaseLaunching back in 2015, this was Jack Daniels first whiskey bottled straight from the barrel. It promises an unadulterated Jack Daniels expression, in single barrel form. Jack Daniel's Single Barrel Barrel Proof Whiskey is a bold and intense drink that is bottled straight from the barrel. With a mash bill consisting of 80% corn, 8% rye, and 12% barley, this non age statement whiskey has a varying barrel strength of 125 140 proof and is filtered using