The CZ vz 52 rifle (
CZ factory
vz model
52 year) was imported before the pistol and like the older vz 24 rifle sold as "vz 24" the vz 52 rifle was sold as "vz 52".
When the pistols were cleared for import, the importers advertised them as CZ52 or CZ-52 to avoid confusion with the rifle.
I have found the commercial 7.62x25mm S&B and PPU to be excellent ammunition in my CZ-52. The military surplus has dried up and cheap participation in modern military matches was one attraction so I am a little disappointed. Since a lot of military ammo was inconsistent or had zombie primers (2nd strike would wake'em) I am not sure I miss the surplus 7.62x25. One batch of 1986 ammo I had left chalky red primer sealant on the breech face and I was glad to fire the last of that cleanup chore.
7.62x25mm Winchester Metric appears to be S&B rebranded. 7.62x25mm Wolf Gold is headstamped PPU.
They are good ammo in the CZ52 but I don't see paying more than I would for the S&B and PPU. On the other hand when I carried the Cz-52 on an ATV on the mountain,I loaded the Winchester metric.
I had seen the CZ vz 52 pistol in WHB Smith, "Small Arms of the World" (Stackpole, 1966) and thought it was very sci-fi looking. I got my CZ52 at Appalachian Fair Gun Show in 2004, $129.95 w. holster, lanyard, cleaning rod, 2 magazines (+ 8% sales tax and $10 BG check).
I did buy two original firing pins just in case but I am still running on the original firing pin. DO NOT dry fire the CZ-52 without a snap-cap. Otherwise there is a possibility the firing pin may break. It was not designed to be dry-fired empty.
The original Czech 7.62mm M1948 loading is replicated by S&B with an advertised 1600 fps velocity. It is slightly higher velocity than the 7.62mm Russian Tokarev and 7,63 German Mauser which may be due to slower buring powder and not necessarily higher chamber pressure. The Cz-52 is tough and will handle military spec ammo but careless hot rod handloads can damage the CZ-52.