The Colt 1911 (and the 1911 by other companies that make it) is an excellent firearm. I have a box-stock Colt 1991-A1 (re-issue of the original 1911, with the straight spring housing) and it’s oh-so-cool.
But I wouldn’t recommend it as a home defense gun.
Automatics have to be cocked for the first shot in order to chamber a round. They also have safety selectors. So if you’re awakened out of a deep sleep, you have to remember to cock the pistol. Or you have to keep the gun with a round in the chamber and the safety on. Some safeties are better than others. For example, the Beretta 92 safety rotates the firing pin out-of-line with the round. There’s no way the pistol can be fired with the safety on. It also lowers the hammer (“de-cocks” it) and pulling the trigger will not move the hammer from its resting position. The safety on the 1911 can only be used when the hammer is cocked. This is called “cocked and locked”. So you have a round in the chamber and the hammer is cocked. What if you accidentally flip the safety off? True, the 1911 has a grip safety (you have to be holding the firearm as if to shoot it to depress the grip safety), but you’ve got a round in the chamber and the hammer is cocked. Good if you’re on a battlefield, not so good to have lying around the house. Even if you have a double-action (like the Beretta 92), you have to wake up assess the situation, and remember to turn off the safety.
That’s why I suggested a revolver in my first post. A double-action revolver can be carried safely with all of the chambers loaded, and there is no safety that you have to remember to work in a panic situation. Just point’n’shoot. The downside to revolvers is that they generally only have five or six shots, and the double-action trigger pull can be heavy (although you can cock it manually – i.e, use it single-action – to lighten the pull). The heavy trigger can be considered a safety device. You have to really want to pull the trigger.
As I expected, someone said my suggestion of a .22 was inadequate. It’s a difference of philosophy. I think you’re more likely to hit someone if you are using something that doesn’t kick and is relatively quiet. (n.b., they’re still plenty loud in a closed place!) I think that your intention should be to stop an assailant from what he’s doing; not kill him. (See my remark on the legality of shooting someone.) I think I would not like to be shot with a .22. People have been killed by them. IIRC, Mahatma Ghandi was killed with a .22 pistol.
Other people advise making the biggest hole possible. There are not many things that will knock a guy down like a .45 cal. 1911 pistol loaded with hollowpoints! But larger guns require more training because of the recoil and noise. And I still recommend a revolver because you can keep it loaded safely. You’re more likely to score a “kill shot” with a bigger round. A dead intruder isn’t going to sue you claiming that he was just confused and thought he was breaking into his own house, having lost his keys.
Someone said you should avoid “trick rounds” like Glaser ammunition. I did mention that they can shatter inside of a body which might cause more damage, but the real reason you want to consider Glasers is that they are designed to shatter when they hit walls. You don’t want your shots to go through walls.
Re: The .22 rifles, such as the Ruger 10-22. As I said, a .22 can be deadly. A rifle with an 18 or 20 inch barrel will be more powerful than a pistol firing the same round from a 4" barrel. IIRC, the 10-22 weighs about five pounds. It’s compact, so you can maneuver around the house with it. It’s cheap – under $200. You can pop in another 10-round magazine if you empty the first one. (That’s a lot of lead flying around in a couple of seconds!) You can find 30-round or even 50-round magazines for it. (Large capacity magazines have been banned, but you can get one legally that was manufactured before the ban.) If you’re out of ammo, you can even use it as a club. Being semi-automatic, you still have to remember to cock it and to turn the safety off.
There are some excellent .22 cal. revolvers out there. Ruger makes a double-action one. I’d like to find a Harrington & Richardson Model 999. This is a 9-shot (single-action, I think) .22 revolver that looks like a lot of fun.
I’m not trying to “sell” you on a .22. I’m just saying that a .22 has advantages that larger guns don’t. They also have the disadvantage of not being able to knock a guy off of his feet.
So what do I have for home defense? Do I keep one of my AR-15s loaded up next to my bed? My 9mm Beretta loaded up with hollowpoints? The 1911? None of the above. Even though I live in L.A., I don’t feel the need for a bed-side gun. If I were to keep a loaded gun nearby, I’d have my Smith & Wesson Model 10 subnosed .38 (not .357). If you want a handgun for home defense, I’d suggest one of the S&W models. If you get a .357 Magnum, you can load it with .38 Special rounds which are cheaper and less powerful (read: less recoil). If I had a shotgun, I’d keep that for home defense over the revolver. With a shotgun there is less chance that I’d actually have to use it because the mere sight of it, or the rack-rack when I chamber a round, might be enough to scare the guy off.
Choosing “the right” gun is a very personal choice. This is a tool that can save your life. It can also take your life or cause it to be taken if you don’t know how to use it. It’s all about what’s comfortable for you. Any gun will give you an advantage over someone who’s in your home (which you know every corner of, and he doesn’t). It might be a .22 revolver or a .50 Desert Eagle. It might be a .22 Ruger 10-22 rifle or a Winchester Defender 12-guage shotgun.
Don’t take anything we say on these boards as gospel. Every one of us has his or her own opinion about what’s the “right” gun for home defense. Every one of us is convinced s/he is right. But what it comes down to is what’s right for you. Go ahead and listen to our suggestions. Print out this thread and study it. Then go to the gun show, the shooting range and the gun store. Talk to those people. Pick up the guns. Feel them. Work their features. Shoot several types. If you have friends that shoot, ask them to take you. Sign up for a shooting class at the firing range. Get all of the information you can. Don’t listen to any one person. If you’re only going to buy one gun, make sure it’s the right one for you.