I picked up a High West Cask Collection bourbon yesterday. The shelf labeled it as "aged in 2nd use Chardonnay barrels," but the bottle label said "aged in Petit Syrah barrels." I was more interested in seeing how the former would affect a bourbon (even oakier?), but as I generally like most of High West's stuff, gave it a try. The Petit Syrah influence is muted, though I need to try it with a splash of water next time to see if it opens up the 60% ABV bourbon a bit more.

The store also had a rye aged in Amrut (India) whisky barrels, blended with bourbon, that looked interesting--can't remember the particular distillery on that one, though, and at $100-ish a bottle, I didn't feel like experimenting. I've seen barley-heavy mash bill whisky aged in rye barrels (there was even a Johnnie Walker rye-aged one I quite enjoyed), but this was a first for me seeing rye aged in Indian whisky barrels (then blended with bourbon). I imagine the end result would be something like a high-rye bourbon but far less sweet.