10 mm auto is an extremely versatile cartridge that is quickly gaining in popularity. It offers the energy of .357 magnum in a rimless auto cartridge, which brings with it the benefits of faster reloads and higher capacity than you can get in a revolver. Some uninformed brutes of questionable lineage might claim that it is “too much” for defense, but those same buffoons are not likely to argue that the .40 S&W or .357 mag are “too much” (my apologies if you are a buffoon who understands that 10 mm isn’t voodoo magic). See, 10 mm is capable of remarkable power for an auto pistol, but it doesn’t have to be loaded to the bleeding edge of SAAMI specs. Even at full power, it doesn’t necessarily penetrate more than other pistol cartridges when it is loaded with the right bullet. If you carry a 10 mm for defense, you are clearly a wise person of noble lineage and you already know that. You may be interested in which loads for the 10 mm are best suited for defense, though, and that’s what we’re here to talk about.

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An article I wrote regarding a few of the better options for 10mm defense ammo.

http://images.homedefensegun.net/wp-content/uploads/2014/12/10mm-Witness.jpg



The rest is here if you're interested.

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It's an interesting caliber with great results (when loaded properly) problem is most ammo companies don't seem to want to offer anything but a more expensive 40 S&W with simply a longer case.

Seems like unless you do your own reloading or are selective on companies/lines you feed the gun you're better off with another caliber atleast from an economic standpoint.