One of the sillier stories is that the ammo produced in then-Czechoslovakia for their VZ-52 pistol will blow up Russian Tokarev pistols and SMG's.
That is just one of the many stupid stories about that cartridge revolving around for a long time. BTW, I'm not trying to "teach" you something - you know about that myths way more than I do, but just to prove my point that people like to fall to myths, rather than facts.
Myth No 1 - Bulgarian made 7.62x25 is too hot, made especially for SMGs and it will brake any pistol you shoot it from.
Fact - on the 16 (16 !!!) rounds pink envelope it is clearly stated (well, clearly stated in Bulgarian...) that this round is "for regular pistol and for SMG use"
Myth No 2 - Russian 7.62x25 in 70 round envelope are for SMG use only.
Fact - on the envelope it says: "PISTOL cartridge, cal. 7.62, 70 pcs."
Myth No 3 - corresponding with 1 & 2 - TT33 and CZ VZ 52 are very strong, well build pistols, capable of endless shooting.
Fact - both are crappy, poor build, cheap eastern block military pistols. That is especially true for the Russian TT33 build in the years around WWII - those "fine" examples constantly shoot themselves to death from not more than 2000 rounds. Is the round to blame? No! The pistol is a POS. It is so poorly build, with such idiotic tolerances where there should not be one, that it is just a pure coincidence that it even works...
Something about 9mm Luger - that round is widespread and popular in Europe since almost day one (for military use). It never lost popularity, or became "found" after years of exile. I believe that the wonder-nine guns that started the 9mm Luger craze in the US were European made. The first widespread polymer pistol (Glock 17) was European made. In 9mm Luger. NATO adopted 9x19 as a standard small arms cartridge in the early 60s I believe. So, all of this is to point out that 9mm Luger is also well known in the US since the 80s. But the history goes something like that: Wonder-nines (S&W M39, Beretta 92F) show up and everybody is: "Wow, this is something great! Small, soft shooting, holds many rounds - what's not to like?". Some years later: "Weak, under powered cartridge - we should make a bigger one (.40 S&W)". Some more years later: ".40 S&W is just not good - too hot, too small... We should make .45ACP (& 1911) great again!". And more years later, up to present day: "Those cute polymer guns with that cute new!!! 9mm round are just soo hot. I mean - sooooo hot!".
By the way, at least according to Wikipedia (I know, I know...) 9x19 was introduced by Georg Luger in 1902, thus making it older than the .45 ACP. Just a fun fact...