Journeyman Featherbone Cask Strength Bourbon - Journeyman Featherbone Cask Strength Bourbon is a made using Midwestern grains and water from an underground aquifer - 70% white corn / 25% wheat / 5% rye comprise the mash bill. Grain-to-bottle, Certified Organic & Kosher. It is produced in the old Warren Featherbone Factory, which used to produce corsets, as well as whips for buggy drivers.