I was reading up on cleaning and I came across this video by "Gunblue490". What struck me was his statement that copper fouling is actually beneficial and not to remove it with copper solvents. I had thought that copper buildup was bad. I understood that the biggest complaint against the Barnes bullets is the copper buildup but this fellow would seem to infer that this concern is misguided. Gunblue490 seems to indicate that after an initial buildup the copper will smooth out the bore preventing further problems including further copper buildup. I was wondering what you folks think of this?