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I'm pretty sure that any gun firing a caliber larger than .50" in diameter is actually considered a cannon legally and that would automatically make it a class 3 weapon in America. Can anyone confirm or deny this? I think that's why the .500 Smith and .50 BMG are the largest, most powerful respective handgun and rifle.
Strange, as said above, any projectile can be lethal if placement is correct. The smallest caliber considered adequate to bring down a human is normally 9mm. Although some people do carry small .22, .25, .32, .380 type pistols when they can't carry something larger and there are plenty of reports of those rounds being lethal.
New calibers are normally created by an ammo producer who has reached agreements with atleast one major gun producer to ensure that a firearm will be produced to fire the new caliber. Then the ammo and firearm producers hope the new caliber will catch on by either filling or creating a niche. Sometimes it does and sometimes it doesn't. Some people say the 10mm is dying out right now which would really be a shame. It's an underappreciated round in my book. The power and versatility of a .41 magnum in a semi-auto. Bottom line, new calibers are created in hope of earning profits off of them.
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Pride is the recognition of the fact that you are your own highest value and, like all of man’s values, it has to be earned.
It is not advisable, James, to venture unsolicited opinions. You should spare yourself the embarrassing discovery of their exact value to your listener.
Ayn Rand, Atlas Shrugged
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