I like a nice clean stainless 357 revolver w/ a 3 inch barrel for my cache's as it does what ya say an yet you don't need magazines and can use two different calibers of ammo. With the old phillips and rogers mods ya can use 17 or more calibers in such. I think CADCO or reeder is the one making em these days.... called the medusa in it's day.
That due the fact ammo may have to be scrounged for the long term makes it my first choice for a basic survival handgun..... Not many looters gonna take 9MM Largo. But then again can looters even read ?:o)
I am bringing only .256 Win Mag so if I get killed, they can't fire my stuff.
So there.
I win.