Thanks for this, I found the later bottles better, and I believe that is what you have. It should be quite rich-tasting but with an evident strong mint or leafy orange taste that must be the rye (both unmalted and non). I would think the small grains is unmalted rye or perhaps barley malt. It reminds me quite a bit of the Potrero style of whisky, and I think again that derives from the common use of malted rye and low distillation proofs via the pot stilling.
Try a dash after in a glass of regular Canadian whisky: it really picks it up a lot. It makes a great addition to an American vatting of bourbons and straight ryes.