I think a lot of it depends on the barrel. I have one barrel that is so rough that I have to brush WAY more than I should. I have been working it over with JB bore paste but I am thinking about going one step more and really working it over until it is smoother.
I will say if a guy is using a brush on a traditional rifle you need to be careful and get the kind that have the loop at the base instead of the crimp. The crimped brushes will come off some day and then you have a problem. If this happens to anyone remember. You can get a copper tube that is about the size of your bore and shove it down over the brush. Then it will come out. I have seen guys try everything including trying to pull a breach plug. Ron