Thanks to another member of Jay Edwards at hunterslife.com he posted this information from some old smokeless loadings for the 45-90 Winchester loadings. I myself a lover of BPCR do not use black powder all the time, and during the winter months in the underground range that I belong to, I have to use smokeless if I want to shoot my Remington Rolling Block 45-90.
And I thought there might be others like myself here, that shoot this great cartridge.