Hirsch 8 Year High Rye Bourbon WhiskeyHirsch Small Batch 8 Year Old High Rye Straight Bourbon Whiskey marries together two mash bill one with 21% rye and another with 36% rye, resulting in a high rye content that adds spiced character while balancing the sweet notes of corn. While the rye is sourced from Northern Europe, the corn originates in Indiana and Ohio. The oak barrels are a #4 char around the base and a #2 char at the head; the whiskey is barreled at 92 proof.