Reflecting bullets 200 yards and hitting the shooter.
I can't confirm the distance, but several sources indicate that the target was at least 100 yards away.
Page 8, Rule 11
A flat, uniform surface helps predict and protect against a bullet's splatter pattern. If the steel is damaged or if anything else is in the way, all bets are off.
Do not use targets that have been damaged, cratered or deformed in any way, as they increase the chance of ricochet.
You want AR400 or AR500 steel anything less is going to crater and cause ricochets.
Steel Plate Targets: For rifles, no steel core, jacketed bullets can be used since higher velocities/jacketed bullets will damage the plates and craters promote a dangerous ricochet hazard.