High West American Prairie Bourbon is a small-batch blend of two straight Bourbons, a 6 year from Seagrams in Lawrenceberg, Indiana and a 10 year old from Four Roses with a higher rye content in the mashbill by comparison: 6 year old Bourbon: Mashbill of 75% Corn, 20% rye, 5% barley malt. 10 year old Bourbon: Mashbill of 60% Corn, 35% rye, and 5% barley malt.