Those that have one of these, are they decent shooters? ...
Yes, all of mine are decent shooters.
Which country makes the best version? ...
I think that that will boil down to personal preference.
Just looking for opinions on this cartridge that I don't know much about.
I really like the 7,62x25 Tok cartridge. A .30cal 86gr bullet running at ~1400+ makes for a nice, flat shooter. If you are used to shooting pistols at 25yd, the 7,62x25 may have you shooting at 50yds with equal success.
I have 3 Russians (sans add-on safeties), 2/ea Romy & Pole and 4 Yugo Mod.57 Variants.
One of the Yugos came with a bad trigger action. I speculate that someone (armourer?) reversed the sear leaf when it became worn and there were no replacements at-hand. I replaced the sear leaf and polished all of the surfaces and now the trigger action is as it should be.
BTW, I wear size L/G gloves (long, thin fingers) and the original TT-33 grip
just fits my hand. Very comfortable & concealable. In winter, while wearing gloves of any thickness (i.e., other than "patrol" gloves), I have to use one of my Yugo Mod.57s with the longer grip.
HTH
BTW, while the CZ-52s look interesting & are fairly accurate, I have found them to be heavy, cumbersome and uncomfortable. I have 3.