We haven't seen bricks of 22 ammo up here for a year now. The cheap stuff is great for plinking and likely shooting rabbits I guess. My son was shooting his CZ .22lr pistol on the week-end when the entire back of the cartridge let go leaving him with a hollow cylinder for a case and powder on his face. He wears safety glasses. First time I have heard of such a thing happening. I believe it was Winchester bulk ammo.
Take Care
Bob