I recall in the early 1980s reading about "Golden Powder." It was yellow/brown in color and, if I recall correctly, could be moulded into pellets for easier loading.
I showed the gun magazine article to a professor of mine, who was a shooter, and he declared that if it were true, it would be the death of black powder.
Well, never heard of it again beyond that article. Apparently, it wasn't quite the success the maker claimed.
I used to work in the career field of testing equipment submitted to the government by private enterprises. Saw a lot of wild claims by manufacturers, and tests revealed the truth of the matter. Been wary of claims in gun magazines ever since, and from manufacturers in general.