Can't sit still on this one any longer, I am running out of valium. I have been packing weapons for real since age 17(basic training). That was almost half a century ago. Still doing it.
When I need a gun I want a long gun. What kind of long gun depends on exactly what scenario I am going to be involved in.
For most of my careers I carried at least one long gun, many times it was a shotgun, sometimes it was a battle rifle or carbine. I always carried at least one handgun, usually two, usually 9mm or 45, sometimes a 38. At age 54 I humped an FAL, a BHP with snub BUG, a tiny 380 in a vest pocket, and a 14" 870 with a folder (to be deployed before shooting). Add to that a full load of ammo and my aging body was packing close to 80 pounds of all sorts of stuff. I would have given up the shotgun before the rifle, but would not have wanted to. The shotgun was for use inside structures where ranges were going to be 30 meters or less. Inside that range the shotgun rules, absolutely.
Don't anyone ever think that racking the action of a pump shotgun is ever going to stop anyone from doing anything. In the last month I have read 3 articles in gun magazines where so called knowledgeable authors each stated catagorically that the sound of the shotgun being racked will stop anyone bent on bad conduct, and/or cause them to need clean underwear. This is crap (pun intended). Bad guys would not be bad guys if they thought like good guys. I have dropped each of those magazines and sent the folks that publish them the reason why.
For my personal security I use shotguns. One at each entrance to my abode, concealed but available, I use buckshot, I prefer #4 for close in confrontations, and up the size as range goes up.
I would happily use a handgun if no shotgun was available. The stopping power of properly applied buckshot has to be seen to be believed. I fully agree that a shot gun will provide 99% one shot stops at HD ranges. On the other hand I once shot a guy 5 times between belt and neck with 00 buck and he did not go down till I clubbed with the gun, that was the only time I ever saw a more than one shot from a 12 gauge with buck being needed. The comparison between any handgun and a 12 gauge (or a 20 gauge for that matter) loaded with buck is just not in the same galaxy.
This does not mean that I disrespect anyone who chooses a handgun for HD, but we all need to face facts.
As far as weapon retention goes, you can retain a long gun much easier than a handgun, particularly if you have a regular stocked weapon that does not have a "pistol" grip. You can also use the long gun as a blunt weapon a lot more effectively than a handgun-as in vertical/horizontal butt stroke. Getting clocked with a long gun stock delivered by someone who has trained rudimentally is an eye opening/eye closing experience.
As sad as the fact may be, in the USA, if you are going to shoot someone, it is far far better for you if the shootee becomes deceased. You are of course shooting to stop an activity, not kill someone. But if there is only one story for the legal authorities to hear, so much the better.
If you are not prepared to take a life, you have no business with a gun. If you are not emotionally and mentally prepared for that scenario, I refer you to an auction site for your gun(s).
The aftermath of the most justified shooting will be onerous and most stressful. Be prepared to get sued in civil court, be prepared for the following events in addition to being sued:
1. The local press will have a headline something like "homeowner slays youth".
2. The mama of the deceased will be on TV saying "my boy wouldn't do that".
3. A teacher or relative of the deceased will describe him as "an honor student".
4. A shirt tail relative of the deceased will be on TV saying " he wanted to be a doctor and help people".
5. You and your gun will be subject to great scrutiny by the media and not a few legal scum trying to show that you were just a "wannabe commando" waiting with a weapon of mass destruction for your first opportunity to kill some minority group member(this is why "tacticool" weapons are NOT cool).
I am not trying to discourage anyone from defending themselves and their loved ones. I am just trying to suggest that there is more involved in a HD shooting than the technical aspects.
All my HD shotguns are inoffensive looking doubles, except my Browning BPS Buck Special, complete with an engraving of Bambi on the receiver. I have quite a collection of tactical weapons, including a few Class III weapons, but I don't want my photo in the paper next to a photo of my UZI with a 32 round mag hanging on it.
OK EOR (end of rant).