Good question. Yes it does.
From a matter of finding the sniper, let's quit harrassing owners of Ar-15s and start checking out owners of AK-74s.
My larger political point is..
The gun grabbers are making the case, and the media is parroting it with a megaphone, that if we only had ballistic fingerprints of every weapon in America, the sniper would be in jail by now.
If the weapon is an AK-74, it shows that 'ballistic fingerprinting' failed to identify not only the correct weapon, but also failed to ID the correct ammo.
It shows from the schoolyard shooting that they either incorrectly ID'd the brass, or found some old brass that they passed off as newly fired. (Discarded brass is common in woods where hunters have hunted for years. I find it all the time on walks in the woods.)
In this particular case, if it is old brass, with 'ballistic fingerprinting' they could have falsely charged some old farmer with this horrible crime.
Admittedly, the differences are very subtle, but they are telling us that even more subtle differences, microscopic marks, will lead them to the correct owner.