I picked up a T/C Renegade this summer in .50 flint. I found a .54 flint barrel and swapped it over. Although the barrel looked good, it never really shot to it potential. I shoot only patched round ball. In other guns, I was able to get it to shoot a 4" group at 100 yards with 100-105 grains of FFFg. Ironically each time I shoot it, the gun seems to do better on the next trip to the range.
I have only been out three times with this gun.
I finally decided to really go after the bore. After two days of scrubbing, I am still recovering black patches. I suspect that previous owner tried the sabots in it and I am still fighting the traces left in the bore. Now starting to get a bit of shine to the rifling.
Anyone have a recommendation for a good solvent to speed the process of removing the plastic pressed/melted into the pores of the steel in the bore?