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tripple 7 on left home made BP on right. they seem to be completely different animals.

Tripple7 on the left, home made black powder on right. Both are 2 gram piles. Black powder on the right seems to have little to no nitrate residue, only carbon residue. on the left is crunchy and hard to remove with a rag.

Yes, agreed black powder should be FFF for percussion revolvers. Homemade black powder should be corned and sifted to 3F between a 25 and 50 mesh screen. Anyone know if the speed of black powder has anything to do with pressure spikes that could result in catastrophic failure of a percussion pistol?

First of all, thanks for all the kind replies, second let me further clarify. Setting piles of gun powder on fire IS how you learn about making it, and is perhaps the only way of charting your progress. I have learned a lot about lead propellants. The most striking is the obvious difference...

Is it possible to make black powder that burns too fast? When I compare home made BP to pyrodex, goex and triple 7, the commercial powders seem to burn much slower in open air.