Originally Posted by
Harrympope
I use a powder in the USA called Alliant black mz.water clean up and as far as I have tested will not rust a bore.it ignites easily with regular strength caps also.much better than pyrodex or triple seven. I had a Rogers Spencer and I used it and that gun with quite good luck. But like you I broke a part and Spares are virtually impossible. I had a machinist make the part and then sold the gun.