If it was a sabot round, how do you ballistically fingerprint it? The rifling marks would be in the discarded sabot. You could match powder residue, but considering there’s probably very few brands of black powder, that may not mean much.
This story may get very interesting.
For a sabot round you would be correct, but even on the Damascus BPR's they would leave a pattern, but you would have to have identical wadding.
Yep. In this case we know where the shooter was and what direction the weapon was pointed.
Look down range from the point of origin, it will be within a dozen or so yards of the muzzle, and within maybe 10-15° of the aim direction.
You could match powder residue, but considering there’s probably very few brands of black powder, that may not mean much.
Yes, but our betters require microtaggents in black powder.
This provides the ability to trace to a single batch of powder.