Anything edible will be. I wouldn't worry about running into a bear too much. The deer population has not recovered in this part of North Central Texas since the Great Depression ended.
No one in the lower 48 is going to realistically live off the land. They will be scrounging like every one else. 223, and 12 gauge will be the order of the day. The military uses both, and it will logically be the only caliber and gauge still supplied to the country.
One may cache but, if one has to become mobile, ammunition is heavy, and one must think of rush hour traffic only in this case, vehicle being abandoned on the roadways for one reason or another.
I doubt that the highway north of Dallas Texas would be passable after a week of chaos.JMOO
TeamNelson, I think we were typing at the same time. I agree, and 22lr, will be a bonus any where, and a boon all the time.