For people who are not law enforcement, the definitive rule regarding handguns is this - have one and carry it. Any gun is better than no gun.
The
best gun to carry is the gun you
will carry. If you won't carry it 100% of the time, because it's too heavy, or it costs too much and you're worried about the finish, or you just don't think you'll need it today, that's the wrong firearm. And frankly, everyone I know who has a carry permit sometimes doesn't carry it. Murphy says that's when you'll need it.
Next rule is to be proficient with the weapon, as you said in your article. If you're not going to practice with it, you're basically fooling yourself. If you are not proficient with clearing the weapon and knowing it's strengths and weaknesses, same thing (as you said in the article as well). Can you shoot accurately with your weak hand? How about if your trigger finger is disabled and you have to pull the trigger with another finger? How about if the weapon is slippery from (let's hope not) your blood? At night? With loud noises blaring away at max volume? Flashing lights in your eyes?
Another important rule is to know the law regarding use of deadly force where you live. If you don't know when and under what circumstances you can legally defend yourself with deadly force, you're likely to end up in prison yourself. That doesn't mean asking people on forums what the law is. It means finding out for yourself and reading the laws where you live thoroughly. Discuss with an attorney if you're unsure. BEFORE you start carrying concealed. Unless you live in Texas, there is no such law as
"he needed killing," even if you think there is.
Smaller notes:
- If you have to engage with a firearm, do not stop engaging until the threat is ended.
- A firearm is not a magic wand, despite what you see on TV. Taking it out and waving it around does not make a bad situation better in most circumstances. If you draw your weapon, chances are very high you will have to use it. Think about that before you draw it.
- If you are going to use a firearm, use it. Too many people carry weapons and are not prepared to use it.
- The logical consequences of firing a weapon at someone is loss of life. Yours or theirs. If you are not prepared to take a human life, you should not be carrying a firearm; chances are it will be your life lost when the gun is taken from you because you could not bring yourself to fire it.
- Accessibility. A weapon the bottom of a purse or backpack is not a weapon, it's a liability. No one will hold off killing you whilst you dig it out and remove the lint from it.
- If you think "I will just shoot to wound him," you are a very foolish person. Same if you "shoot to kill." You shoot to stop. Killing is a side-effect of stopping the threat.
- If you use a weapon in self-defense, even if justified and not prosecuted, do not think your life is going to stay the way it was. It will change in many ways, and chances are high that you will be incurring some major legal expenses - even when you are in the right and no charges are pressed, you could still be sued in many jurisdictions. Like it or not, whether you win or not, your life will be turned upside down and your pockets gone through by hungry lawyers. Count on it. Nobody shoots another person and walks away without taking a hit except in movies.