One of the things I’ve seen the most in writer’s forums is confusion about the type of gun vs. the type of round. I’d like to hit that part first.
A 9mm Parabellum has no idea whether it’s begin fired from a Glock, a single shot Contender, or an MP5 submachine gun. When people ask for a powerful handgun, someone almost always bring up a Glock, but never mentions the caliber. This is a danger sign. Don’t listen to these people.
There is no real difference in power between the Desert Eagle in .44 magnum and the Smith and Wesson revolver Dirty Harry used to teach basic math in 1971. If they have the same powder charge and the same bullet, they will have basically the same effects.
So, what does “caliber” mean?