The long loop of 9mm to 10mm to .40 S&W to 9mm by the FBI looks like a caliber argument until the medium of the test is revealed. When handgun bullets are compared to barriers and gel calibration ...

The most common definition of “caliber,” as it pertains to guns, is about as straightforward as you could want it to be: Caliber simply mean the diameter of the hole in a rifle or pistol barrel. Yet ...