I spent most of my free time this week yrying to clean up the bore. It is pitted, and still has some serious carbon buildup near the chamber. I have been pretty aggressive in the cleaning, and still the patches are catching in 2 spots. I can shoot it, and it will group, but I have to keep charges under 60 grains. I am shooting a .490 ball with a .015 patch, tried .018, but every patch was blown out. I am shooting Goex FFFg powder, patches of .015 look good until I try 70 grains, and then the group is replaced by a pattern. I also saw some weird marks in the bore about 2.5-3 inches forward of the chamber. Most look like machining marks, but a few look like something else.