I don't think you can argue much with a 9mm either. I don't hear too many stories about 9mm pistols failing to take care of perps when the good guys use them correctly. Millions of military users are winning and losing wars with them. Plenty of cops using 9mms as well.

I actually switched off .45 ACPs for that reason, dumped my .45s except for the CS-45 which is special to me for other reasons. Okay, I usually carry a .38, I'm not too concerned about those rounds failing me either.

There's potent and then there's potent. If you want a .45 get a .45. Whatever floats your boat. But your 9mm was plenty of gun for personal defense purposes.