Its been a problem since the school shooting last December. When Obama started talking about gun bans people went CRAZY. The price of guns and ammo went through the roof. People were worried that they wouldn't be able to get ANY guns and that there would be a limit on ammo purchases. Sales numbers were way up. The supply dried up. Took some time for things to cool down and even longer for supplies to start returning.
I still don't understand the disappearance and hoarding of .22 ammo but it is the most widely used ammo in the world.
From what I have heard Walmart wasn't buying much anyways because they were worried about what might happen to the price and supply. At least the price of ammo has dropped but it is still a bit high compared to the pre big scare prices.
I wasn't hoarding any. Just had a supply from before the crap hit the fan. Still waiting for prices to come down more before I buy any for target practice. Just a matter of time.