Similar to your case, I was shooting at five bowling pins with a .45 Colt and factory 255 grain lead bullets. The idea is to knock the pins off the table in the shortest time. After one of the shots, I thought I saw something whizzing back from the target toward my left. When I finished, the timekeeper, who was standing there, said, "here, you shot me," and handed me a much-deformed .45 lead bullet. He said it "happens all the time."
