how to clean barrel at breaking in process
Break-In Procedures: 1  Clean barrel after each 3 shot group for the first 60 shots or more if needed. 2  Check to see if there is any visible copper fouling. 3  Take one of the clean dry bore snakes, soak with copper solvent, and run it through the rifle from chamber to muzzle 3 times and let sit for about 10 minutes.