My buddy has the dies for converting the .32-20 to Nagant. They are a bit short, so some velocity is lost due to the incomplete gas seal.
Our current load is 2.8 grains of Red Dot under a hand-cast 95 grain lead bullet. The Chrony clocks them at around 740 FPS on the average. He's going to try an even 3.0 grains, and see if we can get some more speed out of it safely.
Accuracy is actually a bit better with the lighter 2.6 grain load (650 FPS), but it's still fairly decent.
Once I can get the dies myself, I'll be trying other powders. I'm thinking Lil' Gun should be just the right stuff. Works wonders in my .38Spcl.