I think .22lr ammo is of little use other than plinking at this point. If it really goes to hell, .223,9mm, .40 is all going to be worth more by far.
For getting food I'll use my bow, and won't have a parade of people coming to see what's going on. In fact it would be a quiet defense as well.

“You never need fear a man, no matter what his size. When danger threatens, call on me, and I will equalize.”
Samuel Colt.

�Common sense is genius dressed up in work clothes.� - Ralph Waldo Emerson