I don't have to explode a stick of dynamite in my mouth to see what it will do. (I saw a photo in a forensic science textbook years ago that has left me scarred for life). But you are right, I want a crime scene investigation level of analysis.
I read a short article a while back where the author sat down in an archaeologist's office to interview him. The archaeologist picked up a lead Minie ball that was on his desk and told the author where it was found, and from that one piece of information he could tell what month, day, and year, within minutes, by which military unit it was fired and at which military unit it was fired. That in itself is amazing but perhaps not all that unusual, but imagine if he could also identify what the round hit and how the shooter was armed.
At the Little Bighorn battlefield they have been able to trace the paths of individual firearms during the battle and identify existing firearms that were present during the fight.