Larry Potterfield explains that copper filing inside your rifle's barrel can negatively effect the rifle's accuracy. He shows how to properly clean the barrel. The tools needed include a cleaning rod, a bore guide, cotton patches, a bronze brush, a jag, powder solvent, copper solvent, and gun oil. Insert the bore guide into the rifle. Put a power solvent-soaked patch on the jag and run it through the barrel. Then run the brush through the barrel, recommended ten times. Run more powder solvent-soaked patches to remove debris loosened with the brush. If heavy copper filing is present in the barrel, use the copper solvent on the patches. When the patches come through without debris, run a few dry patches through to remove leftover solvent. To finish, run a patch through the barrel with gun oil.