My Grand father would make his own years ago for his old 1873 Colt.
18gr. FFFG
thin wad over powder, using dowel rod to seat it
12-16 maybe even closer to 24 pellets of #9 "don't remember the exact number
thin wad over shot, using dowel rod to seat it
small ammount of epoxy to cover it all.
Worked quite well at distances up to maybe 10 yards.