The new Cabelo's here in Columbus, Ohio, is open. They sold out of many types of ammo within the first hour. I am told by someone that works there, that they put out new ammo at 8am, when they open, and by 8:30am, it is gone. they still had lots of 30-06, 12ga shotshells, and buckshot in 9 pellet and 21 pellet. but .357, .22, .223 , and most any other semiauto load was long gone. If you want any ammo in short supply from Cabelo's, you will have to be there as the doors open.
The only real difference between a good tracker and a bad tracker is observation. All the same data is present for both. The rest is understanding what you are seeing.