If you believe the stats, then simply carry a J-Frame snubby with five shots, no reload, and never mind with any of the rest...because statistically it don't matter. Whistling through the woods telling yourself, "there are no wolves, there are no wolves", will not change their minds about how tasty you might be.
Statistically they may never choose a human over a rabbitt. Remember, you have your five.
Consider that you can probably shoot a full-sized Glock 17 far better and faster and with greater accuracy than you can a snubby with five shots. (Don't bore me with what McGivern could do, tell me about what you can do right now.)...and then show me live on a force on force drill.
Consider that a hand-filling gun automatically holds more than 5 shots. In fact, the Glock 23 that I shoot better than I shoot my snubby automatically comes with 8 more shots than I will need...statistically speaking. Of course, you can always block out your magazines to hold only five if you wish.
Consider that people miss in gunfights because a gunfight is more typified by the force on force drill we do and not by the shooting sdrills done at marksmanship-based schools. A gun guru who says he's never missed in a gunfight has not been in many reactive gunfights. Hell, even Jelly Bryce missed with two out of six in a reactive fight. Having extra ammo will help you catch up if you do miss.
Consider that the same statistics tell that multiple adversarties are the rule and not the exception. Consider that if its possible to miss when reacting to one, it is three times as likely when reacting to three. Go up against three uncooperative adversaries in a force on force drills (as opposed to a masturbatory el presidente on the safe and sane shooting range) with only five shots in your airsoft and then tell me again about statistics.
Consider that the Islamic Terrorist in SLC WAS NOT STOPPED by a man with seven shots. He chose not to attack the 1911 armed guy because the islamic terrorist was in fact a coward.
Apples and oranges? Just as many cowards are thwarted without the good guy firing a shot. Are we to carry replicas with which to threaten only, because of this?
When I worked in the PRK, I carried no less than three pistols, and close to 75 rounds on my person. I had another bag of five 15 round magazines in the car and a shotgun or Colt Commando. Ammo is cheap, life is costly so I planned to be generous with my ammo.
Today, I carry a Glock 23 every waking moment and have one spare magazine on board as well for a total of 26 rounds. Not exactly the 50 rounds bfoj discusses, but I usually have a Kalashnikov rifle within easy reach as well.