c3shooter speaks the truth.
A couple of things I would reiterate from that article is:
Use a coated one piece
cleaning rod. Do NOT use a sectional or "jointed" rod! I prefer the Dewey brand cleaning rods myself...
Also use a bore guide
, and clean from the chamber end
of the barrel. (If at all possible.)
Never dip your bore brushes in your bottle of bore solvent. Use a squirt bottle or similar to apply the solvent to your brushes and patches. That prevents contaminating your solvent supply...
I also clean
my brushes after use, to remove any abrasive particles / fouling and to flush the solvent from the bristles & core. The ammonia in your bore cleaner will continue to eat away the copper contained in your cleaning brush - just as it attacks the copper fouling in your barrel.
A quick spray with some carb / brake cleaner or "bore scrubber" will do the job and make your brushes last longer, as well as prevent re-introduction of old fouling back into your barrel at your next cleaning.