Deadwood Tumblin' Dice 6-Year-Old Single Barrel Barrel Proof is a straight bourbon whiskey with a heavy rye mash bill that has been aged for 6 years in new charred oak barrels before being bottled at 110 proof | 55% ABV. Proudly made in the USA from a mash bill of 36% rye, 60% corn, 4% barley.