ichudov@algebra.com[SMTP:ichudov@algebra.com] wrote:

Also, a gun owner could simply buy gnu powder in various places and mix the batches.

We call it Wildebeeste Powder in this neck of the woods. If you mix Blue Wildebeeste and Black Wildebeeste you get a virtual Serengeti. There's a good one in the Natural History Museum in Kensington. Just next to the Horese Evolution quiz.