ERN_895;
It only stands to reason that one may be courting disaster when going that route....
The black powder revolvers are proofed for a much lower operating range than their smokeless cousins....
The use of smokeless cartridges in these revolvers means you would be operating at almost double the rated pressure for these revolvers....
That is why all reputable manufacturers of black powder revolvers clearly mark them "for use with black powder only"
John