Here’s something you don’t want to bring to DC:
“Sitting on the backseat, along with the previously mentioned harmless supplies, were two items: an empty 9mm brass case and a spent .223 cartridge.
….
Washington DC law defines “ammunition” in terms of its components (projectile, case, propellant, etc) but also includes the blanket definition of any “devices or materials designed, redesigned, or intended for use in a firearm or destructive device.”
Read more: http://www.ammoland.com/2013/10/how-i-almost-became-a-felon/#ixzz2hjAMJ7UC