Have you ever fired a weapon? For a scientist you are remarkably closed-minded. This nothing more than unexpended gunpowder. Surely you subscribe to
Occam's Razor. Being a man of science. Because if you actually believe what you are posting in favor of this film then I would suggest you may be a
charletan.
I don't know anything about Occars Razor and I simply don't care to; and your words are worthless here unless you have the correct answer, which you
don't.
Nice try for a beginner though, maybe you should learn more about guns. I'll bet I've fired more guns and ammo in a day than you have fired in your
entire life.
I think it may be a piece of packing from the primer part of the bullet or its powder being blown out igniting especially as it looks like an old type
load weapon IE not modern ammo