Well why else would someone bother about PF if not for gamesmanship?

In real life the round in your cylinder or magazine, no matter the calibre or bullet weight, is going to have to get the job done not matter what it's PF. But everyone should be carrying a decent round anyway.

I prefer to shoot my .45 ACP in IPSC competition. It tends to score better than the 9mm's in Classic Division. But when on duty I'm quite happy with the 9mm Hydra Shock 147 gn ammo in my Glock 17.