While their idea of how to safely film such an event are questionable at best, the results did not surprise me at all. When a friend was helping me build my first bullet trap, I used the same kind of steel that was basically used here. My White Ultra Mag was the first rifle I used and you can imagine both his and my surprise when I blew right throw it. Since that failed back stop attempt I have moved to 3/4 inch steel. I have not gotten through it, but have dented it. Also there was a steel pipe used as a bracing and legs to hold the backstop.. muzzleloaders will go through steel pipe. Just for your information.

Also the ricochet effect off many surfaces, especially steel is a very real danger. I have a PVC target stand that stood ten feet in front of the steel trap, and you can again, imagine my surprise when that all of a sudden was broken. That's why one PVC target stand at the house is a little taller then the other one...