Following a carefully controlled trickle distillation, Octomore 08.3 was matured in 56% first fill Bourbon casks, the remaining in ex-Paulliac, Ventoux, Rhone and Burgundy casks.
Octomore Masterclass 08.3 edition contains barley peated to a phenol level of 309ppm (parts per million).
Until then, the peatiest whisky on record was Octomore 06.3, released in 2015 and containing barley peated to 258ppm
