I was at the range before it turned cold and was shooting some reloaded WWII black tip bullets at steel gongs out to 150 yards. After firing a few I went to hang some targets and took a look at the gongs. The gongs are made out of 1/2" armor plate steel, but they were cratered and had little holes in them. I stopped shotting them. No sense it tearing up the gongs. I was surprised that they would penetrate 1/2" armor plate.