I've had a little trouble coming by info about the Prichards' bourbon -- the producer only distills rum (from Louisiana sugar cane molasses) and went into business on that basis. My understanding is he buys bourbon stock already in barrels. He calls his bourbon (NOT Tennessee whiskey) 'double barreled' because he rebarrels it after dilution from barrel proof for a time before bottling. It is bottled at 90 proof at nine years old.
The distillery is located in Kelso, Tennessee, a little 'wide-spot-in-the-road' community in rural mid-southern Tennessee, not many miles north of Huntsville, Ala.
Its website looks like it hasn't been updated for a while, and only discusses his rum, but is mildly interesting.