Be sure to chime in on the weekly 9mm vs 40 vs 45 thread, you're about the only one with any kind of real life experience to speak against the 9mm. It's not politically correct to do so...
Perhaps the gelatin tests are all just clever marketing to make everyone buy more ammo no matter what the caliber is. EG if the the FBI says they want a round that penetrates 12" of gel, then all the manufacturer has to do is tailor the bullet to make it past 12" and they're done.
Even a 22 magnum will penetrate 12" of gel:
Perhaps the gelatin tests are all just clever marketing to make everyone buy more ammo no matter what the caliber is. EG if the the FBI says they want a round that penetrates 12" of gel, then all the manufacturer has to do is tailor the bullet to make it past 12" and they're done.
Even a 22 magnum will penetrate 12" of gel:

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