I can't believe you are going to get any sort of consistency trying to shoot .32ACP from a Nagant. The jump before the bullet finds rifling with that combination is probably going to be pretty close to a world record (barring the Taurus Judge, of course).
Not that long ago, a couple of the online ammo stores was selling off their reloadable 7.62X38R ammunition (both Privi and Fiocci) for $15 a box, sometimes it was even with free shipping. I haven't recently checked to see if they sold out or not, but this is going to be cheaper than any fresh .32ACP you are likely to find. Might be worth a look.
I have just recently figured out how to reload for the Nagant. It is not difficult at all, and if you have a set of .30 Carbine dies, they can do double duty for you, and you wouldn't even need to invest in a die set. All you would need is a .32-20 shellholder and MAYBE a .223 sizing die to use to crimp the case mouth (my reloaded cases fit and work just fine in my Nagant without any additional crimp,
Just sayin'.