RE: black powder reloading
I prefer 35mm camera film containers because they are air and watertight. When I got my Savage 10ML-II I no longer needed that much space for powder, so I bought a few dozen little plastic screw-top vials from Randy Wakeman that hold up to about 60gr of smokeless powder and are the perfect size for dumping into the muzzle.
Not exactly a new idea, but a good one nonetheless.
Mike