Did some shooting with my Encore .50 cal, these are the results;
50 cal BP - 100 grains Jim Shockey Gold power ffg, 250 grain TC shockwave sabots, Remington Kleanbore primers, Nikon Pro Staff 3x9 40 silver scope. This produces 1.5" groups at 100 yards. Played around with different powder loads but this combo shot best. The JS Gold is true to its name for ease of cleanup. I shot a final 15 sabots once I settled on the load. No cleaning and awesomeeee groups (1.5" at 100 yards). The cleanup was some hot water and quick brush and a few swabs, sparkling barrel. I also had no issues with loading the sabots. Went down and seated very easy.
I liked it much better than 777 and Pyodex.