TMJ ammo is a bit of jargon used by some people in the self-defense community to refer to any ammunition that is designed to work effectively in short-barreled firearms.
The term “TMJ” stands for ” temporomandibular joint “, which is the medical term for the hinge that connects your jawbone to your skull. The idea behind using short-barreled firearms for self-defense is that they are easier to conceal and thus offer a higher level of protection than long guns or pistols. And since TMJ ammo is designed to work well in short barrels, it’s a good choice for those who want to use a concealed firearm for self-defense.
Matthew Answered question June 29, 2022