It depends on the situation
If we are only talking about a partial meltdown in society or stranded in the wilderness. If it is a meltdown in society, it depends on the situation. If we are talking about a partial meltdown, I would choose
1. 1911 .45 or CZ 75 for my carry piece. This is assuming I am still going to work.
2. A pellet gun-YES A PELLET GUN. I still have neighbors in this scenario. I live in a neighborhood. It would be useful to pick off squirrels and rabbits at home in my backyard if need be. There is a very nice FAT, JUICY squirrel I have been eyeing.
3. My in home defense when I am away would be my Remington 870. While I am away trying to secure water or food, my wife has to hold down the fort. Nothing says, "Maybe I should pick a different house" better than hearing the rack of a shotgun slide.
4. I would keep the MBR at home for the moment. I could pull it out to shoot deer which are also in the neighborhood. This would be about the time things might be starting to get interesting in the hood.
Bug out scenario w/ car
1. My Garand, Pistols, AR, .22 revolver and 12 gauge and ammo come with me. I would trade the pellet gun and a few old shotguns for gold jewelry or dried food. Someone always wants to stay behind. Load up what I can with the hard currency. Besides, I can use the extra firearms as currency. I would bring my Kabar, machete, backpacks, fire striker, steel wool (great fire starter) and some other camping supplies.
Bug out on foot
1. I carry the Garand with ammo (two bandoliers), pack, knife, machete, .45 on my hip with 50 rounds and .22 with 100 rounds in the pack. My wife carries whatever supplies I can't and the AR with 4 30 round mags. We would also have the fire starting supplies (striker works well off of the machete). She feels comfortable firing it. She also has a .45 on her hip and the 9 mm in her pack. I carry gold jewelry as currency. Which ever firearms I leave behind I trade with the neighbors for more gold or dried food.
2. I want that .22 to shoot the rabbits and squirrels I so love to eat. I would leave the pellet gun because in this scenario noise is no longer a concern.
Some may say I focus too much on taking the guns with me. I would try and keep them strictly because they would make good barter items. If things got too heavy, I could slim down as needed. It is better to have than not have and wish you did. I would only part with what I have if we are talking about a God forbid, end of the world or government scenerio.
Check out this site. I really enjoyed reading it. It deals with some scenarios.
http://ferfal.blogspot.com/search/label/Argentine Collapse