Hello everyone. I am new here and this is my first post. I have a White Super 91 .50 caliber that I bought new many years ago. I haven't shot it for several years now. When I was shooting it I was using 90 grains of ffg black powder and a 460 grain Superslug using percussion caps. I don't think Superslugs are available anymore. I did order some "Noexcuse" 460 grain slugs that I haven't tried yet. I also have the 209 primer breech plug set up from White that I have never tried. I am looking for some recommendations for a black powder substitute/209 primer/bullet combination and would greatly appreciate any help I can get. Sorry for all the questions. I haven't done any black powder shooting for a very long time.