QuestionableMaynard8130 wrote on Dec 8
th, 2017 at 12:46pm:
I suspect that the early smokeless powders were created as exactly that. loads similar to the standard BL loads but with less smoke and less powder fouling
This is indeed true with some early smokeless powders! Fortunately some of the early smokeless powder cans had load data on the back, and one can of "Schuetzen Smokeless" by Du Pont that I own says it is designed as a bulk powder to fill the case, just like black powder.
But others I own such as Schultze (also by Du Pont) were much faster burning, and it specifies the can of powder is "about 7 oz.", but is equal to one pound of black powder. So shooters had to figure out the ratio, and know what to do when using this powder in BP cartridges.
From what I've seen of early smokeless powders, they can be equal to BP, but more often a bit faster. And very soon after introduction they went mostly to faster burning powders.
Most people generally accept that smokeless powders came out around the mid 1890 era. But that's actually 10 years after the French came out with the first smokeless powders! The 8mm Lebel was the first cartridge introduced that was loaded with smokeless powder. The Lebel's 8mm ammo reached velocities of 2,000 fps in a gun made in 1886! The previous French Gras was a 1400 fps cartridge. It pretty much revolutionized ammunition, and caught everyone off guard with it's performance. Took the rest of the world a decade to catch up!