Tut (mostly) what he should.

At the relatively "soft" steel parts can be easily read each bullet impact (i shoot with 4.5 mm steel balls), each shot leaves a small bump in the material. Most balls land in the rear receptacle, some bounce but from the straight rear wall in the center of the ball and then catch lying down behind the target holder. Since the disk is not kept around, it means that the balls partially fall out at the bottom corners of the bracket and roll across the floor. Depending on the shooting skills it can happen sometimes that you have to gather together almost half of the balls on the ground after the shooting.
After all, there is rarely rebound / ricochet, safety goggles is recommended in case of a shooting distance of less than 10 meters!