I wonder if that tang you are getting is a touch of young potstill taste. We just released our second batch of our Irish style potstill whiskey. It would be single potstill if made in ireland. Lots of unmalted barley. There is a tang if you will to it, I call it a linseed oil character. A hard tastes if you will, that one could easily mistake for havuing grain whiskey in it. This new release has 5 percent oats, and it really shows.