[malloyd]

Incidentally the powder isn't necessarily the hardest part of making a smokeless powder round, you also need to think about primers. You can set off black powder with pretty much anything that will make a spark, but smokeless powder is a bit harder.

Even purpose designed black powder substitutes are unreliable in flint or wheel locks (they're intended for caplocks). Unsensitized nitrocellulose powders will be worse. Back in scouts when we tried nitrocellulose guitar picks as fire starters (they worked reasonably well, but burn out *very* fast), even a ferrocerium rod didn't reliably ignite them with one spark, I wouldn't be surprised if a steel spark failed more often than not.