Jack Daniel's Single Barrel Barrel Proof Rye is whiskey as nature intended it - bottled straight from the barrel at its full proof. With a grain bill of 70% rye, 18% corn, and 12% malted barley, our Barrel Proof Rye delivers charcoal-mellowed smoothness with the bold spice of rye. Barrel Proof Rye is bottled anywhere between 125 to 140 proof.