Every great debate has a middle ground. For this one it would be the .40 S&W Caliber. It has more power than the 9MM, but can still hold more rounds per magazine than the .45. The price is also in the middle. The .40 round is widely adopted by Police and Law Enforcement all over the world.
However, this compromise doesn’t seem to sway avid fans very much. Most polls, while certainly not scientific, usually show a huge divide between 9MM and .45 with the .40 being a distant third.
