Steel targets that do not move, Can return your bullet to you. This also goes for movable targets that are overly heavy, and suspended from a chain, that twists and redirects the bullet. Harder bullets are indeed harder on steel targets, and more likely change direction on impact, since they don't flatten out like a pure lead bullet.
Years ago at a rendezvous shooting station featuring a fifty yard shot at a small anvil, welded to a chain, a shooter shot at the target, and when he hit it, the bullet returned to the firing line. A young woman was standing next to him, and slightly behind him. It was a scalding hot day, and she was wearing a floor length prairie dress. Thank God she had her legs wide apart in an effort to get a little cool breeze up under the dress. The returning bullet went through both sides of the dress, and kicked up dirt on th hillside behind her. This memory has influenced every metal target I had installed since. I was standing on the other side of the shooter.
Hungry Horse