About 40 years ago, Congress considered making powder companies add chemical tags to their powder, so that powder, or it's residue could be traced to a manufacturer and lot, and perhaps back through the wholesalers. The problem is all the FAKE powders and other smokeless powders. Instead of just a half dozen makers, there are now 50 makers of the different kinds of powder, not to mention those who make it themselves.
It is far too early at this point for rational call for knee jerk legislation and rules. Might have been white powder, sugar powder, ANFO etc.
My bet would be on an over the counter substitute that can be purchased for cash from a box store anonymously. Some reporters are still talking about ball bearings and BBs even though the surgeons have given press conferences saying they have removed no such items from victims.
At this point, if somebody said it smelled like farts, folks would worry about registering beans and go stock up.
I worry, given the number of copycats of shooters going nuts across the country after Newtown, how many idiots will now be making bombs.
when it comes to center fire, I have the powder, lead, molds, dies, brass and primers to load my self. Got enough to shoot for decades without going to the settlement for supplies. Don't need no stinking store ammo.
Something about those who need store ammo that says they do not share the independent early American spirit some of us have. (And the song says country boys will survive. Not those who need store ammo)
Janet Reno (remember her?) wanted to use "Tag-ints" AKA Tag Inserts as a way to track all explosives. However, she and the ATF were eventually convinced that explosives are so much a part of our lives in terms of construction that using them as a tracking mechanism would be a nightmare becasue they would be all over the place. Also, there was a concern that the addition of the "Tag-Ints" would change the explosive properties of known compounds and would cause a recalibration of all known explosive property calculations.