Thread: Proper black powder

Im trying to find real black powder (goex, swiss, c&h etc) in the wairarapa / manawatu all thats available seems to be that 777 stuff.
Never used it and it says not for rifle cartridges in big cheery red letters, which is exactly what i need it for.
Has anyone used this stuff in snider or martini henry capacity cases, or know where bp might be available. My regular supplier says its bloody sparse at present.
Any advice appreciated including the inevitable rude comments