So then in your opinion there is no advantage at all of the .40 over the 9mm. If that is the case then why does anyone (including law enforcement) carry 40s?
Good question. Nearly every army in the world uses 9mm and most police forces for some reason in America its popular.
What the police use here for example.
The PSNI issues the Glock 17 pistol to all officers replacing the Ruger Speed Six formerly issued. A range of 'long' rifles replaced the Ruger AC-556 select fire rifles.