Sorry. There are NO powders other than Black Powder that function properly in a flintlock. You have been already given a description of the problems using anything else either as a priming powder, or for the main charge. When a manufacturer tells you that you have to use a priming charge of black powder to get his Substitute powder to ignite properly, There is NO POINT to using the Substitute powder, NO? After all, if you can get the BLACK POWDER needed to Prime that main charge with the required 5 or 10 grains, why bother using the substitute powder at all? You will still need that permit to get the black powder.
We don't discuss Making Black Powder here for a couple of reasons:
1. It requires a license here in the States to make it, and is otherwise an illegal activity.
2. Its a very dangerous activity, that done incorrectly, can result in injury or death.
3. Claude says so.
That last one may not impress you, but I hope the first 2 do, particularly #2. The ingredients of black powder are well known, and even the mix. But putting them together safely is a big problem. The manufacturers also have a way to coat the granules with Graphite, to reduce the risk of friction or static electricity from igniting the powder. That is not easily done properly by the home chemist.
The key to understanding why all these substitute powders don't work right in flintlocks is the higher ignition temperature. In an open igntion system like that found in flintlocks, Matchlocks, and wheellocks, lighting Black powder, or any powder is like putting a match to a fuse.
Contrary, in a closed ignition system like Percussion, or Cartridge case, the fire from the exploding percussion cap or primer actually INJECTS the flame into the powder creating a much more rapid burning and faster rise in chamber pressure. That is why the substitute powders like 777, Pyrodex RS, and P , and others work fine in those guns, but not in flintlocks.
A powder other than black powder that can be used in a flintlock has not been made. Don't hold your breath on that either. The purpose of these substitute powders is to skirt current regulations restricting black powder, and not to really come up with a different powder that will work better in either percussion or flintlock guns. Its the same mindset that is making substitute kinds of shot because of current restrictions on using lead shot to kill migratory waterfowl. :hmm: :shocked2: :hatsoff: