Alcohol Content In Whisky -

In the United States, proof is exactly double the ABV (e.g., 40% ABV is 80 proof). In the historical British system, "100 proof" was roughly 57.06% ABV, though this was largely replaced by ABV in 1980. Evolution of Alcohol Strength During Production

Most whisky falls into one of three distinct categories of strength. Each represents a different philosophy of production and consumption.

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