Kel-Tec PF-9 

To paraphrase an overused marketing catchphrase, “9 is the new .380.” And it’s not really a fanciful overstatement. Why? A couple of years ago, microsize .380s were all the rage, but today’s crop of ultracompact 9mms are nearly as tiny and considerably more potent.

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If there’s one cartridge that’s had its potential boosted by new-component technology in the last decade or so, it’s the 9mm Parabellum. Although it was once derided by legions of .45 ACP fans, it’s safe to say that the high-performance 9mm loads of today are different enough from what was available in the 1960s and 1970s as to almost make them seem like an entirely different species.

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