For that situation, if you are using it for just foraging, then the LR over 410 or 20, with the 24" barrel will be better. The 24C, AKA the Camper, is handy to keep packed away somewhere, but the 4"...
more What are you expecting at the end of the world? A singleshot-over-singleshot may not be the best weapon of choice unless you can reload really, really fast when the gangs come after your food supply. ...
more I have a .22 magnum over 20 gauge and you can buy adapters to shoot .22lr... just increases your effectiveness a little.