Carlton, Carla Harris. Barrel Strength Bourbon: The Explosive Growth of America’s Whiskey. Clerisy Press, 2017. First edition.
In Carlton's private-barrel selections, participants first taste at barrel strength, then sometimes with water when the selected barrel will be bottled at the brand's usual lower proof. She reports that adding water has sometimes changed which barrel the group selected. Barrels of the same batch and age are not necessarily alike.
Carla Harris Carlton, Barrel Strength Bourbon: The Explosive Growth of America’s Whiskey (Clerisy Press, 2017), Chapter 2 — A Limited Edition of One, supplied PDF screens 76–78.
Original PDF screen 78
Original PDF screen 76
Carlton, Barrel Strength Bourbon, supplied PDF screens 76–78.
Chapter 2 — A Limited Edition of One
Ready as a source locator, not independent claim verification. E-reader capture screens, not print pagination. A practitioner observation supporting separate native- and normalized-proof evaluation; not a controlled trial, not a universal dilution ratio, and not an assurance that estimated drops reach target ABV. Original PDF screen 78, reader location 519.
Source and locator
No access, Chapter 2 — A Limited Edition of One, supplied PDF screens 76–78. 
Formatted outputs
Carla Harris Carlton, Barrel Strength Bourbon: The Explosive Growth of America’s Whiskey (Clerisy Press, 2017), Chapter 2 — A Limited Edition of One, supplied PDF screens 76–78.
Short form: Carlton, Barrel Strength Bourbon, supplied PDF screens 76–78.
Bibliography: Carlton, Carla Harris. Barrel Strength Bourbon: The Explosive Growth of America’s Whiskey. Clerisy Press, 2017. First edition.
Usage map
Supports
Verification checklist
A practitioner observation supporting separate native- and normalized-proof evaluation; not a controlled trial, not a universal dilution ratio, and not an assurance that estimated drops reach target ABV. Original PDF screen 78, reader location 519.