United States - 45.6% - Discover the latest innovation from the New Frontier--Bulleit Rye Aged 10 Years Whiskey. Using the same mash bill as the classic Bulleit Rye, this 95% rye and 5% malted barley whiskey is a balance of smoothness and spice Product Highlights. United States - 45.6% - Discover the latest innovation from the New Frontier--Bulleit Rye Aged 10 Years Whiskey.