Ammo where you are???
Around here 22 was kinda hard to find, but it was nothing compared to trying to find large caliber stuff.
For about 8 months, I couldn't find so much as one small box of .45LC in any of the stores, and I noticed that .357, .44 and .454 were just as impossible to find.
Then a new sporting goods store opened up in town (not that there weren't already a few in town already), and wham, they've got the hard to find calibers in stock all the time.