I cleaned my BP 54 Plains Pistol last night. Everything was the same except for using bore conditioner instead of Bore Butter. Well I checked today and there was a orange/yellowish piece on the bottome of the barrel. I ended up using a q-tip attached to my cleaning rod to get it out. I couldn't tell if it was rust or not. So does the Montana Extereme bore conditioner react with black powder? I never had this problem before using the bore conditioner. So I dont know. Whats your guys opinion.