Benchmark Full Proof Bourbon is the highest proof offering in the Benchmark bourbon lineup. According to Buffalo Trace, the brand is “named after the McAfee brothers who surveyed a site just north of Frankfort in the late 1700s. The rye recipe bourbon is yet another label that honors the storied history of the Distillery and the land it sits on.” Coming in at 125 proof, the bourbon is denoted as full proof due to the fact that it is bottled at the same proof that the distillate originally entered the barrel.