Why, when and how often? Factory barrels only?
First off, I shoot moly plated bullets in everything.
Second, I haven't used a brass brush in years, strictly nylon.
Third, every time.
Fourth, I don't have any factory barrels......
1st, I push a couple of patches with Bore Tech Eliminator, then about ten passes with the brush, patch once, another 10 passes with the brush, and a squirt of BT in the solvent port, and let it sit for a bit. I never totally exit the muzzle.
Come back, run a couple patches through it, then wrap a patch around an under sized brass brush with a little JB, and short stroke your way back and forth down the barrel. Pull it out, re-wrap the patch, and do it again w/o adding JB. I might do this 3-4 times. I re-use these patches all the time, starting with a well used one, progressing to a barely used or new, continually rotating down the line.
Put 4-5 drops of Kroil on a patch, push it through, flip it over & through again. Pull out the bore guide, clean the chamber & lugs, put the BG back in, and another patch with 3-4 drops of Kroil twice through, grease the bolt lugs and call it a day.
Not counting the wait, I can be done in 10-15 minutes.
