Glendronach Cask Strength SeriesBy bottling the whisky at its natural cask strength of 61%, The GlenDronach Cask Strength offers connoisseurs a deeper insight into the distillerys signature profile. The eighth release of this expression has been matured for 10 years in both Pedro Ximnez and Oloroso sherry casks, resulting in an exquisitely rich and full bodied single malt. With each Cask Strength release, Master Blender Rachel Barrie selects the perfect marriage of these two cask