Pyrodex is a lot less finicky than T7 which has a tendency to be somewhat particular depending on the application. Pyrodex will work fine in any percussion gun provided the gun/load doesn’t create a lot of fouling issues. Pyro also works quite well in cartridges, load the same as you would with real but the amount of compression can make a big difference in performance, IME minimal compression produces the highest consistency. Larger cartridge cases and heavier projo’s are more to pyro’s liking, 160-180gr in .38s/.357m; 260-300gr in .44m/.45c; same in rifle cartridges, the more lead mass you park on top of it the better it works; strangely it does work well with lighter pellet payloads in smoothbores. Yes, it is more corrosive than T7 or BP but if proper cleaning is done ASAP after shooting it’s not an issue, if using a repeater with fully resized cases, the action needs particular attention – cartridge cases must be decapped and thoroughly cleaned ASAP too but that applied to any corrosive powder/primers. Pyro is unforgiving on clean-up, there’s a very limited grace period. I’m no fan of Pyro but if it’s what you got or all you can get it’ll work. As for C&B revolvers, thorough cleaning can be an issue with some of them depending on the mechanism and level of experience the shooter has with them, if the shooter isn’t experienced, I would strongly suggest he stick with gun designs that are easier to clean and I’d suggest avoiding complex snail/patent breeches.