I went out to watch PPC the other day at an indoor range, and the RangeOfficer told me to stand 2m behind him at all times as he paced back and forth behind the shooters at ranges from 7m to 50yards to the backstop. From the 7m position, with me about 10m from the backstop, I got hit in the face, and then again in the leg a minute later, with metal bits. No blood. Surprised the heck out of me. When I asked, I was told they were the copper jackets of bullets and it happens all the time. I think there were 10 people firing simultanious PPC that night.
When I got home I noticed the next day there were several sharp bits of metal on my carpet -- apparently my shoes picked up some copper jacket bits from the range floor.