The Barrell Private Release Bourbon series is an exercise in micro-blending that results in limited, highly individualized runs. The team selects bourbons of four different ages and then creates a series of unique recipes. Each blend number has its own ratios of, for example, 5, 9, 13 and 15-year old bourbons from Kentucky, Tennessee and Indiana. Each is constructed in its own ex-bourbon barrel, the ratio saved and printed on the label. With each release, new base bourbons are selected so that, regardless of how fantastic any one blend turns out, it will never be made again. Designed for those seeking exclusive products, this is an intriguing experiment in Bourbon.