themugger

Hi everyone, I hope you can help me.

I'm looking for a suitable lift charge for fuel mines. At the moment I use lift charges removed from shells, but this is proving very expensive (and annoying having to pull perfectly good fireworks apart). 

In an ideal world I'd like to just purchase some black powder however my shotgun licence only permits me to obtain a synthetic substitute, as used in shotgun cartridges.

My question is, does anyone know how this synthetic powder compares to BP and whether it would be suitable for this application?

Also, does anyone know if there are any types of firework (perhaps a large gerb) from which BP can be easily extracted?

Thanks in advance for any responses.