I know nothing about guns, except for the fact that they have a trigger. Is a CA-7.62x25 a high-powered gun?
One of the articles you posted said it was .32 caliber. A bullet of any caliber can kill, but no one here would dream of saying a .32 is a high-power round.
7.62x25 Tokarev Cartridge - Sellier and Bellot
7.62x25 Tokarev Cartridge - Sellier and Bellot. Bullet Type, 85gr FMJ
(.308) magnetic. Case, Brass - Length: .972 - Headstamp: S&B 7.62x25. ...
w3.one.net/~melchar/tokarev/tokssnb.html - 2k - Cached - Similar pages
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PPSh 7.62x25 submachine gun
... numbers. Its drum magazine holds 71 rounds (Tokarev 7.62x25 aka Mauser
.30). Later, 35-round stick magazines became more common. ...
www.a-human-right.com/RKBA/ppsh.html - 6k - Cached - Similar pages
Also known as the .30 calibre Mauser Military- it's a supersonic load.
The Tokarev used this cartridge and was considered to be one of the first magnum powered semi automatic handguns .... of course it's obsolete now with .50 AE Semi autos handguns being commonly available.