The commenters are falling into one of three (rather predictable) groups:
1. Switch to .45 ACP! JMB invented it, and that’s all you need to know!
2. Switch to 10mm! Why settle for a lesser evil?
3. Hah! Told you 9mm was enough!
I’d like to (humbly) suggest a 4th and 5th option: Hit your freakin’ target, dude, and there ain’t no such thing as a one-shot stop with a handgun.
There were former and current law enforcement officers in my NRA Instructor class last weekend, and not to brag (much), I smoked ’em when it came to demonstrating the quick and proper defensive use of pistol.
1. I practice a lot, and cops don’t. Nothing against the cops, they’ve got their hands full with all kinds of things I don’t have to worry about, like domestic violence calls and handing out speeding tickets, while I am laser-sighted (not literally, of course) on the defensive use of a handgun. But still, ammo is free for cops, why not take advantage of it?
2. As I said, my goal with my training is simple: Stop the attack. A cop has to worry about so much more than just the defensive elements of his/her job, and there’s only 24 hours in the day.
3. I practice in a stressful environment. Competitive shooting has GREATLY improved my ability to use a handgun in a stressful situation. IPSC, PPC, IDPA, whatever. Pick one and practice at it, and your defensive accuracy will improve. I guarantee it.
As for the 5th option, well, I lied. If you want a one-stop shot with a handgun, there’s always a .600 Nitro Express revolver.