The key to the apocalypse isn’t the gun, it’s getting ammunition. There is a lot of .223 and 9mm and .22LR out there right now, but after the Paco-Lips, eventually it will all run out.
I used to have a Savage ML II muzzle loader. Smokeless muzzle loader. Really, you could break open ANY ammunition and use that powder, it didn’t care. You could use sabots, ot patched ball, or probably stuff little pewter cast soldiers down the barrel and stuff will fly out the end. You could chip the tips off of kitchen matches or make your own black powder.
If only we could find 209 primers.
If you shoot shotguns, you feel my pain. Primers are like unicorn teeth right now.