I've been able to find useful powders and bullets at the local Billings Scheel's and Big R. Cabela's is mainly a wash except for small pistol primers. This is mainly for rifle components. Rifles are FAR more important than handguns and rifles get shot about 10:1 ratio or more in my shooting, which is often at real things and not paper targets. Big R had Hornady .224 75 HPBT in stock and IMR 8208 XBR powder, a good combination. Also picked up some IMR SR 4756 for pistol. Scheels had Hornady 7mm 162 A-Max in stock and several useful powders, including 8# kegs. Big Bear had Speer 7mm 160 SPBT bullets and Federal primers. All this stuff is good for windy Montana prairie shooting, which is what I do mainly.
Cases and bullets for most handguns are in short supply. Shotgun ammo is abundant. .22LR is almost nonexistent on shop shelves. Except that I have ammo cans full of assorted .22LR already, and have always been that way for decades.
I have big coffee cans full of primed 9mm brass ready to load, and assorted bullets, and over a couple thousand loaded rounds of various types. That's the way you are SUPPOSED to be stocked up at all times. Quite simply, if you are anything but a youngster just starting out, you have no reasons for running out of ammo and reloading components. You do NOT shoot up everything you have and then expect to find what you need on the shelves, even when there is no gun ban scare going on. Except if what you are shooting is a fun gun and of no real importance.
I could run out of pellets for my Sheridan .20 cal air rifle and not be worried. I could shoot a patched BB if I had to. Or a round lead shotgun pellet. It would get all the birds and rabbits a person could eat, and keep the garden and attic free of pests (variable power, you can shoot varmints inside the house and not hurt the house). But since I have several thousand pellets for that rifle as well, I'm not hurting.
If you can't find some pistola boolits and other stuff, get yourself a Benjamin or Sheridan PCP pump air rifle for under $200 and go knock off birds, bunnies, squirrels and assorted pests for a while. These little air rifles made by Crosman these days are powerful enough to require a firearms certificate in the UK before they can be legally owned. Out in the small game hunting field, the Benjamin and Sheridan air rifles are far deadlier than your pistola. I shot hundreds of small game animals with my Benjamin .22 cal air rifle as a kid, sometimes dozens of them per day. And get a Williams peep sight for it. The open sights are rather trashy, and the Williams is more accurate and fully adjustable. H&N (Beeman) Baracuda (Kodiak), JSB, Benjamin round nose, and Crosman Premier round nose are what you use if you want to hit what you aim at, and it will rival ANY .22LR at any price at close range as far as accuracy goes.
There is simply NOTHING else in the world as accurate, deadly, versatile, affordable, high quality, dependable and downright cheap to shoot, as well as legal to shoot inside this town as the Benjamin and Sheridan PCP pump air rifles. Since the 1960's there has usually been a Benjamin or Sheridan air rifle in my closet, except during military service. My ENTIRE repair expense so far has been to replace a pump seal in my Sheridan Blue Streak, which cost me $1.50 and 15 minutes to install myself,, most of the time spent rounding up common tools. Pyramid Air sells kits to restore old Benjamin and Sheridan air rifles for $30. Most of the time, all you need is the pump seal and bolt o-ring seal. The bolt o-ring can be bought at a hardware store for under a buck. So if you get an old Benjamin or Sheridan for almost nothing, it costs you $30 plus S&H to bring it up to like-new operating condition, and it will outshoot ANY break barrel air rifle as far as accuracy goes, with virtually no kick and recoil inaccuracies.
So there you have your weapon and shooting components in stock at some place in your local area. My friend bought a NEW Benjamin 392 for his son for $150 at Academy Sports, and they are glad I steered them away from the trashy imported break barrel air rifles which are as obsolete as a Model T car.