Last Christmas get-together at my brother-in-law's place we were shooting into a long-used steel bullet trap. From 50 yards a .223 was shot at a small-caliber spinner target and a ricochet came back & hit my nephew below his eye hard enough to break skin & leave a circular imprint. Later another ricochet hit my daughter but did no injury. Now, the family is afraid to use the bullet trap as a safe backstop. I contend that shooting a high velocity round at a too-small spinner resulted in the spinner flipping around before the bullet had completely passed it and it hit the bullet, sending it up at the angled metal, allowing it to ricochet back. My truly much more experienced family members (Marines with extensive shooting experience and technical knowledge) disagree. We'll be gathering again in a few days, and I'd like to be able to discuss the situation intelligently with them. What do y'all think?