Originally Posted by
frogfurr
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.
Thoughts... I really hope the .503-460 grain No Excuse work for you. They actually might be to loose to fit in the bore. Not all but many Whites have a large 50 cal bore and you might need a .504 even a .5045 conical to fit your barrel correctly. First time you go to load one you will know.
I really do prefer to shoot T7 powder vs real BP or Pyro, it somewhat cleaner and not near as corrosive. If you were to continue to shoot caps you probably would not run into the crud ring problem.
You might make yourself some Windex patches to push down between shots if fouling were to become a problem..
When I first got my White Umag I switched to 209 ignition and shot that for quite awhile, but have recently changed back to cap ignition and will stay with it in a plunger gun. I use #11 Mag caps.
Cayugad, Sharpshooter, and Flounder will jump in here at some point and they both are White shooters with a lot of experiance...