Rare Breed Barrel Proof Bourbon was first released in 1991. Since then, there have only been 10 releases. So now you understand why it’s called “Rare Bird.” Let’s cut right to the specs. Don’t worry that there is no age statement. All the experts agree that this powerhouse Bourbon is a combination of six, eight, and twelve year old top-end product. The mash bill is 75% corn, 13% rye, and 12% malted barley. And it’s bottled at cask strength! We’ve tasted it straight up, but this monster was made to stand up to ice and a splash of water and teach it who’s boss.