https://www.grafs.com/retail/catalog/category/categoryId/3501Graf's is showing their brand and Scheutzen in stock.
Bob- I don't think there are ANY phony powders that ignite well in a flinter, without real black powder (booster charge) being put down first.The phony powders have a very high ignition temperature and some are higher than others. T7 or 777 by Hodgdon is one of the phony's having high ignition temperatures required.& yes- most of them are quite aggressively corrosive, likely having Pyrodex at the top of that list.
Still scarce as hens teeth up here in Alaska. I may resort to pyrodex in the cap locks to save the black powder for my flinter. Pyrodex is avail almost everywhere and I have 5-6 lbs of it.
Any updates on black powder availability? Thanks, Jerry