Originally Posted by ParkesburgBrewer
I'm assuming the expected ABV does not account for the additional alcohol contributed from the Bourbon. It may not be enough to make a difference in a 5 gal batch.
If you add 10 oz whiskey to 5 gallons of beer:
16 cups per gallon, 16 * 5 = 80 cups of beer
10fl oz = 1.25 cups @ 40% abv
1.25 / 81.25 = 0.01538461538 (amount of solution that is whiskey)
40% * 0.01538461538 ~= 0.62% ABV boost
It does make a difference, but not a crazy amount.