777 is considered to be a good powder for the smallest calibers because it burns so clean that swabbing is mostly unnecessary.
That's not to say that it will solve the accuracy problems associated with taking multiple shots.
After all it's just a pistol and not a rifle, and 50 yards is quite a long distance to expect rifle size groups with such a short sighting plane that the pistol has.
The loading difficulty does seem to be caused by the powder fouling.
I can understand if you don't want to try 777 because that powder can be erratic from over compression when used in some guns too. But if you can get some Swiss then you just might find that it makes a difference.
Swiss certainly shouldn't shoot any worse because it has the best ingredients found anywhere on the whole planet, and most competitive target shooters use it for a reason!
