There may be an occasional need for a bore brush but never use a metal brush in the bore of a muzzleloading gun. Too many people have gotten a metal brush stuck in the bottom of their bore and then have the tip of their rod come off while they are trying to get the stuck brush out. Then they are in deep dukey. If you think you need to use a brush, use only a nylon brush. The problem with brushes is that as you start them into the bore, the bristles lay down and when you start to pull it back, the bristles just dig in and become stuck. Nylon bristles are more easily forced back the other way and the brush can be removed. Be absolutely sure that every rod that you put down your bore has the tips cross pinned or they are very likely to eventually come off.
There are a couple of ways to remove a stuck brush. If the tip has not pulled off your rod, try turning it clock-wise (never counter clock-wise or you will unscrew it) to lay the bristles down as you pull it out of the bore. If the tip has pulled off your rod and the brush is stuck in your bore, go to the hardware store and get a piece of thin walled metal tubing long enough to reach the bottom of your bore. Force the tubing down over the stuck brush and then extract it. But the absolute best way to handle the stuck brush problem is to never put a metal brush into your bore in the first place.
Very seldom will you ever need to use a brush in your bore. I have one in every size but most have never been used....but, like breach scrapers, I have them just in case. You should be able to take care of all of your bore cleaning with warm soapy water and a patch(s) on a cleaning jag.