I got caught short on .22 rimfire "the last time". I learned from that. I've been stockpiling .22s since Trump's election day, when I bought a case in case the election went sideways. Since then, UPS has been hauling a lot of .22LR my direction. Never again.
I've always had a schittload of centerfire ammo on hand, for pistol and rifle, and enough components to replace them all a couple of times. I think I've got four flats of 12 gauge, too. Never again.