I was in the local Sportsman's Warehouse yesterday. They get their weekly shipments on Thursday, put them out after close on Thursday night, then sell out on Friday morning.
I was asking what they got to determine if I wanted to come back Friday morning, just in case they had something that I absolutely needed to have. They didn't, so I asked whether they had gotten any bricks of .22lr. The cute girl behind the gun counter said, "nope. All we got was 12 100rnd boxes."
Sportsman's entire weekly shipment of .22 was 1200 rounds in 100 rnd boxes.