With thanks to Bob Cook, a Discerning Drinker, who on 27th October 2020 left a comment with the recipe for this delicious high-proof whiskey, equal parts...
I have the Redemption 95% straight rye that's only 92 proof, so I dropped it to a 2:1 ratio of rye to Martini Rosso. used Peychauds for bitters over Angostura. An absolute delightful drink.
I am glad I saw your comment as I decided on this drink tonight given it was the cocktail of the day only to discover as I was pouring the Carpano, I only had 3/4oz! Since I had some Punt E Mes, I followed your lead and used an 3/4oz of it to make the full 1.5oz of vermouth. You reckoned right; it was pretty good!
Made it with Rough Rider "The Big Stick" rye (distilled and bottled on Long Island) in honor of 9/11/2001. Boker's Bitters are a good alternative in this.
Just tried this after a Reverse Manhattan ('after' as in the following evening, not the following five minutes). Martini Rosso works wonderfully in the Reverse, but this needs something more, ahem, 'assertive'. This was lovely, and foregrounded the Rittenhouse Rye to advantage. But do try a Reverse Manhattan - great drink!
I absolutely recommend trying the Redemption straight rye if you get a chance. Inexpensive, so taste to price point is excellent. https://www.diffordsguide.com/beer-wine-spirits/8097/redemption-rye-whiskey