One thing to remember is that the Soviet Union replaced the 7.62 Tok fifty years ago--with the 9x18 Mak (so, using some of the logic exercised in this thread, it must be better). BTW, part of the reason it was selected is because it was more effective (and it's no paragon of power).
And let's not forget the 9x19 came about as a direct effort to increase the effectiveness of very similar calibre--.30 Luger (7.65x23).
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