What advantage is there to a 9mm?

[WR Moore]

I don't like them because they have WAY to high penetration and many people who are shot with them don't know they are shot, and that can become a problem,

1. Don't use ball ammo.
2. That tends to happen with any caliber when you don't aim the shot and/or properly stroke the trigger.

 

[flop-shank]

WRMoore is right. The best loads in 9mm are very .357 magnum-like.

 

[Duke426]

I'm with USAF385 and madmedic1955 on this one.

Use what YOU shoot well not what is sexy to everyone else or what a "real man" would shoot. If you shoot a 9mm better than a .45 then there is a huge advantage in that.

Understand that no handgun caliber is going to be the end-all, be-all when it comes to gun fighting, but some solid hits with a 9mm are infinitely more helpful to your cause than a bunch of misses with a .45acp.