That’s gonna be tough. I like 9mm. I never picked up a taste for the heavier calibers.
A nine to the noggin is worth much more than a full magazine of calibers starting with .4 hitting a bullet proof vest.
That may not apply to the typical self defense scenario, but consider the powers that be attempting something as foolish as gun confiscation.
Media-controlled politics are getting so bad in America that someday democrats can openly commit voter fraud, while a republican cannot even take a drink of water on camera...