777 FFF loose powder is what I feel works best in the synthetic offerings. Good for sidelocks (my Renegade/Hawkens)and my inlines - more speed & energy too. Some barrels need a little more swabbing with 777 - not because it's dirty, just because the fouling crystalizes/hardens near the ignition source/breech. But to me it's worth a few more patches every range visit. The stuff is that good on the performance-end.