I.W. Harper Bourbon is distilled from a mash of 73% corn, 18% rye and 9% barley and aged at the Stitzel-Weller distillery for a minimum of four years in new American oak.
Whisky Advocate -
The base bottling of the 'new' I.W. Harper from Diageo. Source is 'new' Bernheim; no age given. Nose is simple: hard candy and corn. A fairly simple and somewhat thin mouth as well: sweet, with hints of ripe melon and apple, and an edge of oak dryness. Finishes well, with a cleanly sweet spiciness. Table bourbon, though a bit pricey for that.