Only at Cabela's that I keep finding empty shelves on .22lrs rounds. Elsewhere, I'm able to get at least two boxes.
Mills in Oakdale let me buy up to ten boxes on the .22 wmr.
Another shop up north let me buy two boxes of each kind.
I've been told that there's a handgun that uses .22 bullets and that is why they are short and limited in amounts. But it's just a matter of hunting around for them. The government hasn't prohibited them from being made and sold.