Hey All,
Choice Ammunition is having a sale and they have a lot of cowboy ammunition in stock. including 44-40 and 32-20.
https://choiceammunition.com/cowboy-action/
I have purchased 44-40 through them and had great results. I got 45-70 through them, had inconsistent results (2 or 3 seemed to be low charge) and my rifle just does not like smokeless. Either way, have had good service.