What is the maximum distilling strength of bourbon in degrees?

The maximum distilling strength of bourbon is 160 proof, which translates to 80% alcohol by volume (ABV). This regulation is significant because it ensures that while the spirit is distilled at a high strength, it must still be diluted to a specific proof to be marketed as bourbon. The requirement that bourbon must be distilled no higher than 160 proof allows for the retention of the grain character and flavors that are essential to its identity. This limit helps maintain the balance and complexity of the spirit, influencing its taste, aroma, and overall quality. Understanding this threshold is crucial for bourbon enthusiasts and professionals, as it underscores the importance of traditional production methods and the spirit's adherence to specific legal definitions.