I own a tire shop, & last week a lady came in with her grand daughter's car with a bad tire, that had been run flat, that she wanted replaced When taking it off, I thought I noticed a hole in the steel wheel, on the outside lip where valve stems are positioned. When I got the tire off, the hole was a bullet hole the size of a nickel. No bullet in the tire, so it must have exited. Any thoughts on the caliber? I'm thinkin .357 at least.