I had my fuse hole enlarged from a small pin hole to 7/64 matching the fuse that I bought using some DuPont 7625 smokeless powder as a test. Ignition but main burn back out of the fuse hole and not enough pressure to eject the paper wad. I'll make some black powder in a few days and try it again but suspect that seeking closest point of least resistance it will again come back through the now proportionally too large fuse hole.Lit off 1-16th inch fuse and it burnt out at the entrance hole to the cannon and did not ignite the black powder. Will try a fulminate packed 1-16th combustion chamber tomorrow maybe if I can get it soldered. no pics because no battery charger.