I used to use Remington Bore Cleaner (previously called gold medallion, now called Remington 40-X Bore Cleaner) but have since switched to Montana X-treme copper cream which is less coarse than 40-X. Other products that I have used successfully when I can't get copper cream (Midway UK is forever on backorder and Sinclair et al can't send overseas) are carburettor cleaners (like Mercury/Quicksilver power tune) which are great on carbon deposits/rings and safe on metals and alloys and patch-out (liquid concentrated wipe-out). Alot of people use brake cleaner (e.g. Renault) but I think carburettor cleaners are more effective - I can't see the difference between the inside of a rifle barrel and the inside of a race engine cylinder (the cylinder is probably more susceptible to chemical corrosion than a stainless rifle barrel). I don't brush as the copper cream does the same job more effectively IMHO. Some of your benchrest friends may question your scubbing the bore back and forth with a brush as reversing the brush may cause excessive abrasion in concentrated areas - lots of people push the brush only one way and remove it at the muzzle end before reversing the rod and re-attaching the brush at the muzzle (very tedious) and reversing the brush over the crown is a big no-no. I always remember my old college coach (UK Palma team shooter) and his mantra of "oil, dry, medallion, dry, medalllion, dry, oil - repeat if patches not clean" (rare if done after every course of fire!).