And Now For Some Really Heavy-Duty Scientific Stuff Here

"...we play this little game at the hospital. Only the newbees have a problem with it, and it goes like this: Look at an x-ray of a bullet riddled body. Then guess the caliber. From only the x-ray. Here's the key; more than two, definitely 9 mm. Less than two, .40 cal and above. Works every time. Back in the day when there was only one relatively small bullet we'd all say ".357" and we'd all be correct. Don't see as many magnums since semi-automatics replaced them, but it's a gas to look at the one shell and ring out in unison."