I am looking to ditch some of my guns in calibers I don't use any more. I want to replace them with more common and available (I know nothings available right now) calibers. I'm not thinking full prepper, but as ammo gets scarce what might I have an easier time finding at stores or in private hands? I assume .22, .223/5.56, 9mm, and 12 gauge are some of the most plentiful ammo out there, but what about 30-30, 30-06, and .308. Out of those three, which one would you theoretically have the easiest time finding out in the wild? Any other common calibers I'm missing?