Taking a little time to break-in your barrel will mostly help with copper build up until the throat gets a bit polished out from having a few rounds put through your rifle. There is no set rule for how many rounds it will take until copper indications reduce. Some rifles I've had never had any coppeer indications and others would take 30 or so rounds before the copper indications reduced. I often question if it is really necessary but I still do it if for no other reason than to just see what the new barrel is going to do.
Also I don't like or use abrasive cleaneres.
Break-In & Cleaning