What's more important than lube selection is your powder coarseness selection. Buy the FFF 777 and be prepared to give your bore a water-bath after every range visit in order to keep your boster/drum/nipple channel clear of crud that is difficult to remove with Q-tips, pipe cleaners or your standard bore brush.
As far as lubes go, I would continue to use the same type used for your Great Plains first... if the results aren't satisfactory, then experiment with others.
Nobody reading this thread knows what kind of lube your rifle will like because rifle diameters are not consistent with any manufacturer.... even if it's the same model, same type barrel, same stock... etc.
