This straight rye whisky(without the 'e') uses a mash-bill of 51% rye, 35% corn and 14% malted barley. It is made in the style originally common in Pennsylvanian...
Looking at the listing, a major error is there. Rittenhouse Rye is a barely legal rye, featuring a mashbill of 51% rye, 37% corn and 12% malted barley. A re-tasting is in order, as the perception of 'more rye' can affect the final result.
Very glad to see the correction. However, if I was you, I'd still taste it again, as this can now change how you perceive the whiskey, given the mash bill change. I'd also remove the "...in the style...common in Pennsylvanian rye whiskies," as the mash bill is anything but.
Not sure where to ask this, but given that my bottle of 100 proof Rittenhouse Rye has just run out, I was wondering whether you had any thoughts re. substituting 90 proof rye in place of 100 proof? I've got a whole bunch of rye with an ABV of 45% (eg. Woodford Reserve), but I notice that the database here doesn't offer that as a potential (if sub-optimal,) substitution in the same way that it does suggest that you can replace some new/aged rums with one another.
The alc./vol. plays such a key part in the character of a rye whiskey that I have created separate categories for 40%, 45% and 50% ryes. Depending on your low-strength rye you may find work better in place of a bourbon in our recipes. Or, using our Cocktail Finder you'll find recipes from fellow Discerning Drinkers for ryes of both 40 and 45%. Under "By base spirit" look for "Whisk(e)y - Rye whiskey (90 proof / 45% alc./vol.)