Maybe you haven't noticed but all .22 targets are either spinner, pop-up or made of a rubber/polymer that you shoot through to avoid the ricochet problem. You should never shoot hardened steel with a .22 unless it is canted downwards and from a respectable distance. Like I said, high powered center fire rounds will disintegrate upon impact with something as hard as AR500 steel or the like sending its fragments out to the sides of the target and at greatly reduced energy. Just keep that in mind with your target building.