A few years ago I was lucky enough to get some range training with a police instructor. The only calibers I own start with 3 (this includes the 9mm).
A bunch of other guys were there, let’s say “dressed to impress” with all kinds of tacticool stuff and some very pretty things that start with 4.
Once we moved on to movement and stress drills, those things that started with 4 were spraying lead all over the place.
My little eurofag peashooter (Italian, no less) shot their asses off.
Clint Smith clearing malfunctions.
https://youtube.com/watch?v=BfyULpEhmug&feature=share