I have always used the bronze brush followed by patches & H9 solvent. Been doing it that way for decades, and always seems to work fine. One little trick i learned was this:
After you're sure the barrel is about as clean as can be, take an old brush and wrap a clean dry patch around it. Run same thru the barrel. You will be amazed at the amount of additional crap that can be gotten out of what appears to be a spotlessly clean barrel this way.
After you're sure the barrel is about as clean as can be, take an old brush and wrap a clean dry patch around it. Run same thru the barrel. You will be amazed at the amount of additional crap that can be gotten out of what appears to be a spotlessly clean barrel this way.