You know right away whether you hit or not.
When shooting rifles at longer range, you don't need to peek through a scope trying to identify your hits - that distinctive ringing sound will tell you!
You don't have to go down range to change targets all the time.
You get a free workout lugging targets around.
It's really, really fun.
Don't use just any steel for targets. Steel targets safe for shooting are made to careful specifications. They're not only certain thicknesses, but they're made from hardened steel designed to handle bullet impacts. Matt Teske, President of Competition Target Systems, notes, "We recommend only shooting steel that is hard enough to destroy the bullet on impact. That is why we only use certified AR500 steel for our targets."
Always know the rating for your steel targets. Different targets are appropriate for rifles and pistols. Some targets may be for rimfire or standard pistol calibers only. Others may be rated for specific rifle calibers. Make sure you know what you're using.
Pay close attention to manufacturer's guidelines for safe shooting distances. If the guidelines say not to shoot their pistol targets from closer than 15 yards, then don't. You'll find similar distance ratings for rifle targets as well.
If your target shows any signs of cratering, pitting, or cracking, retire it. Throw it in the trash. Use it for ballast in your fishing boat. Make decorative lawn art. Whatever you do, don't shoot at it anymore.