They will often exagerate bullet wounds. I have talked to many and they really dont know what they are talking about in many, many cases . Its like every other "eye whitness" case. All bedazzled at what they think happened, and they really dont know what bullets normaly do, so they go on like a death ray hit them.
Having seen this first hand, when someone mentions hearing anything from a medical practitioner about wounding, I have to be skeptical. Anything short of ballistics trained, experienced, pathologist that is.