I ran across three listings for "Hirsch [age] Rye Canad 750" here. {For some reason I can't get the link to work right. After you click on it, and a page comes up, search for "Hirsch" to get to the page I saw.}
Does anyone know anything about this whiskey?
Yours truly,
Dave Morefield


The tannin gets leached out over the years and the casks are susceptible to increased deterioration. With bourbon and straight rye, the casks are new to begin with so the deterioration factor, and rancio effect, are less, but still are detectable in whiskey, sometimes (again in my experience) even as young as 8 years old.