Your username now has me confused. Yes, use a bronze brush with the copper remover. It has stiffer bristles and will work better. It will disolve in the ammonia, that is why you should flush out the barrel after brushing, then swab another patch with ammonia in the bore, wait a few minutes and run a clean patch in the bore to look for the blue. Run your brush under hot water to save it from the ammonia after you get through with it.
Nylon brushes are useless. They are to soft and will not do what you intend, kind of like getting help from a Democrat.