Steel targets tend to have minimum distances for safe use in the fine print. AR500 steel is preferred over softer steel if you wish them to last very long. And you do need to get the .22 targets rather than the ones designed for larger calibers. I'd get one from Midway or Brownells or one of the target mfgrs. If you are having trouble locating .22 (or any other ammo) you may wish to keep an eye on slickguns.com.