Scot Powder Company

WB, this might be more in your wheelhouse but asking for anyone who has had some experience with this powder. Bought a box of stuff from an estate sale (give away) and the lady told me that the big crate in the corner went with it. After getting it home and looking thru it, it had several silver cans of Solo 1000, 1500 and Royal Scot D that have never been opened. Not much info on the net but did find some reloading info. Any of the misfits ever used or played with this powder. Any help would be appreciated.
Thanks