Look on the shelf of your local sporting goods store.
The ones that stopped selling ammo before the unrest anyway?
That said, there are still some Dallas Walmarts selling through their pistol ammo, and there’s *still* plenty of ammo for my Saiga 12...
In case you didn’t know:
https://www.cnn.com/2020/03/10/business/dicks-sporting-goods-remove-guns-from-440-stores/index.html
Most sporting goods stores no longer sell ammo anyway. You won’t find ammo there because they stopped selling it. Most places are now gun shop or mail order only as a result.