About thirty years ago, a sibling brought home dozens of these galvanized steel sheet metal scraps. They have been sitting outdoors for all this time. So I took some rattle can paint and gave them some color. Then took a few out to the gun club range for informal tests. The red plate has 3 holes from a .22LR rifle plus several dents from .32 S&W Long fired from a Savage 348 with chamber adapter. Orange plate was hit once with a .45LC and two .45 ACP "Ball".