Wolf reportedly will offer some proper ammo for the Nagants soon. The Nagant case is tapered - like an M1 Carbine's case - so the .32 S&WL and .32 H&RM straight cases will bulge - maybe split - and won't be reloadable. Expect some lead shaving/spitting with those shorter cases, too. The anemic (575 fps) Russian target ammo - $15/40 - or the pricey Fiocchi (675 fps) ammo - $50/50 list - will gas seal, as designed. The thin mouths expand and require a SA extractor rod for removal - as do those bulged/split straight wall cases of the .32's. Even the new Starline 7.62x38r brass is made too short to bridge the gap - but should not split at the thicker mouth, allowing a few reloads.
The .32 ACP cylinder I bought would not rotate in either of my original Nagants - and went back. The Nagants were built, for most of their production, en masse by very inexpensive labor - ie, hand fitted. You'll note SN's on the cylinder and frame have to match for proper operation... that ACP cylinder may have to be 'fitted' just to work, much less to time properly. Also, the .32 ACP ammo is not all that cheap now. The best way to go is by reloading - .32-ish bullets in either the Starline Nagant brass - or in my choice - modified .32-20 brass, which still won't gas seal - but mostly just drops out. Commercial ammo of interest, at least to most Nagant users, is the Aquilla .32 S&WL. I haven't tried it, but the thin Magtech .32 S&WL brass is a definite splitter - at least a third split in my use.
The Nagants are neat... definitely build up the old trigger finger!
Stainz