The only time I have been burned was when 22 LR disappeared after the election of Obama. I had plenty of primers, and they were still available anyway, and powder, but 22 LR were nowhere to be found, and I had got into the habit of just stopping at Wally world on the way to the range for 22's. Unfortunately, in CA it was nearly two years before they came back.
I have since made it a habit to buy cheap when I can and to buy as much as I can afford. I sold a rifle I wasn't using and stocked up on primers and 22's in 2017. As 22's are available locally at ~.07 now, I am shooting them. I buy two boxes and shoot one as I rebuild my stocks.