Around two years ago I bought the eleven degree forcing cutter kit from Brownells after talking with Sheriff Jim Wilson. I cut some of my pistolas, which was Smiths and Rugers. I only shoot cast. The cutting didn't hurt any of them and it helped some. A friend of mine just bought a used Ruger Redhawk four inch barrel that shot cast boolits at twenty five yards into maybe 6 to 8 inches at 25 yards. After the eleven degree forcing cone cut the group shrank to around 2 inches. Amazing difference. My question is, have any of you tried this with a cap and baller black powder pistola ? I haven't owned one for several years, but that might change today because I am going to the gun show at Lakeland Florida. thanks Jim