I tried .32S&W in my Nagant. It took forever to clean the lead off everything! I even felt the splatter! Not a fun time. Won't do it again. If I can't find the correct round for the weapon- it stays home.
I don't experience leading with new or reloaded .32 s&wl. Such a slow moving lead bullet shouldn't do that, but depends on the ammo and lead hardness I guess. If you are actually looking for Nagant ammo, try J&G or SOG for milsurp ammo or AIM Surplus for hotshot or .prvi ammo.