Polishing chambers my way
Here is the method i have used for the past 25 years in cylinders from .22lr to .44mag:
1. Get a tube of flitz / maas metal polish.
2. Install proper size patch & slotted tip on cleaning rod
3. If cleaning rod is a 2 or 3 piece, then unscrew the front piece & chuck up in a variable speed drill.
4. Smear the metal polish on patch & insert into chamber
5. Use drill to spin patch inside the chamber--slow to moderate speed. Repeat on each chamber,
6. Remove patch & repeat using clean patches with no polish until patches come out clean.
7. Ta-da---you are finished !!! Do the same inside the barrel, but don't use drill to spin the rod.