In 1987 Buffalo Trace Distillery began experimenting. Since then, Buffalo Trace has produced over 1,500 experimental barrels of whiskey now aging in its warehouses. Each of the barrels has unique characteristics. Some examples of these experiments include unique mash bills, types of wood, barrel toasts and more. Buffalo Trace periodically bottles a few of these experimental barrels and makes them available to consumers. Each experiment that is released is very limited and rare.