Since this thread wasn't taking about living in a permanaent Post-apocalyptic world or the mindless dead coming for your brains, I want to mention a couple of things that have come up regarding the choice of firearms (handgun, shotgun, rifle)
A handgun will likely protect you in 90 out of a hundred situations. A shotgun will likely protect you in 95 out of a hundred occasions. But a rifle will likely do the 99% job.
Wrong. A shotgun will not protect you 95% of the time, and a rifle will not protect you 99% of the time. Why do I say this? Because you WILL NOT have that shotgun or rifle on you all the time. You CAN'T carry it all the time.
Seriously guys, It just isn't that way in a geological disaster. If you have the foresight to know the need to protect yourself, there is a good chance that you have other property or family. That means you have WORK to do. You aren't just going to be sitting there waiting for it to be over. Well, some will, but they are bonafied lazy jack-@sses if everyone else is working.
No matter how much preparation you do, you will have things that require the use of both of your hands. That long gun will not be in easy reach. Also, no matter how much you prepare, you WILL have needs to go out into public and you WILL sense that it isn't all that appropraite to be walking around your neighbors as such with a long-gun strapped over your back. In a time where people are trying to pull together in cooperation, you will be putting out a strong indication that you don't trust them. Furthermore, it reminds a lot of people that they aren't safe-- oh they know it-- but don't rub people's face in it. Walking around like Rambo isn't going to get you very far.
With a handgun as your first priority, you will be armed ALL the TIME. I'll take having SOMETHING on me over having my AK in a jeep or at the house anyday. You can go into public with it. EVERYONE around here open-carried a handgun on their belt at all times in the aftermath-- and it was no big deal.
Suppressing fire and flanking maneuvers? Come on now.
I have to agree with Nil on this. Like I said, I am considering the more likely geological disaster scenerio rather than something out of "Mad Max." Flanking and suppressive fire? Ain't gonna happen. That is WAY too much effort in a time when EVERYONE is feeling sick, is dehydrated from working and not drinking enough water, miserable from the heat, and and completely exhausted from the effort of simply living.
I have to say this frankly. If a group of looters have the intelligence and organization to develop some kind of column that will use flanking maneuvers and suppressive fire, you frankly don't have anything they want. You'd be a waste of time when they could go after BIG targets. Think I am only speculating? Well, maybe... but I know the mentality that EVERYONE has in those events. Prioritizing what you do (or in the case of looters, what you go after) is crucial. You simply don't have the energy and resources to do everything. Also, you constantly feel a sense that there is never the time you need to get everything addressed that needs attention. The 101st Looter detactment will be going straight for what will yield the most benefit. That ain't your house.
Even the idea of the 101st Looter detachment is a fantasy. Your looters are FAR more likely to be a disorganized 4-5 people -- or at worst a few more. And they aren't following military tactics.
You'd be a LOT better off learning about 3,000 other things that you will find that you NEED to know in that situation.
I am not saying that you don't NEED firearms, and I DO have rifles and shotguns. I just see a lot of people operating and planning from very unrealistic expectations. If you plan poorly, you can't be surprised when your outcome is poor as well.
Edit: I forgot one serious consideration. In practically all family and property needs, a long-range rifle is going to have very few times it is NEEDED. If someone is 300 yards away, the chances are GREAT that they aren't an imminent threat to your or yours. Taking that shot is far more likely to get you charged with murder when everything is all sorted out than do anything else. Threats to you and yours (if they are threats) will be well within range of a shotgun or pistol-- although I kept my AK at hand for home defense--but that was my preference. I never felt that I had to pull out the ole' Remington 700 to take out "looters" that I could barely see with my naked eyes.
John