A few days ago, there was a thread on another board on using small amounts of White Powder (AKA smokeless) in BPCRs.
While looking for something else, I came across this page on "Powder & Primers."
Might be on interest to some.
It loads v-e-r-y s-l-o-w-l-y
http://members.aol.com/mudsmeller/propellants/propellants.html