Maker's Mark 46 Cask Strength Kentucky Straight Bourbon Whisky Limited EditionMakers Mark 46 Cask Strength is the barrel proof version of the standard Makers 46. Makers 46 starts off as standard Makers Mark, which is a wheated bourbon made in batches of less than 1,000 gallons. Then heavily seared French oak staves are placed in just emptied standard Maker's Mark barrels, which are then refilled and returned to the warehouses to finish aging for an undisclosed amount of time.