[WayneS]

...most references to bullets refer to projectiles ranging in size from small to large...

My 13 year old son can tell the difference between a small bullet wound and a large one. I though these people were supposed to be forensic scientists - so why don't they know the specific calibers and types of slugs that made these wounds?

Or, maybe they DO know but don't want to have to tell us...

[sport]

Your last sentence answered your own question.