Barrel King Straight Bourbon Whiskey - Batch S15.24Missouri SiB+ Batch S15. 24 104. 5pf, 52. 25% ABV What the heck is a "SiB+"? This term was coined by Barrel King to describe their unique process of blending and bottling. When you've found that almost ideal barrel, why use it in a blend when you can use just add a small amount of another barrel to fine tune it to perfection? In this case, the Barrel King team thought this 11yr 36% rye Indiana Bourbon just needed a splash (1 gallon or less) of a 9yr