The only supply problem we have around here is the .22LR ammo. I haven't seen any for years now. Luckily I am well stocked for several more years of drought. But you can find everything else easily ... just no .22LR ... not anywhere. I reload all my centerfire, excepting a few that I can buy cheaper than I can reload - 7.62x39, 7.62x54R, 8mm Mauser (well, you can't find the cheap 8mm easily anymore, but I bought a couple of spam cans of the mil-surp stuff back when it was available and cheap).

I abide by the rule, "Buy it cheap, stack it deep". The goal is to keep 8 years supply on hand - enough to make it through a bad president who causes a panic buying spree, then manages to get re-elected.