The Calhoon "slick silver" bullets should reduce copper fouling. Can't say about powder residue.
The thing about regular (non-slick silver) coated bullets is that a bit of the coating rubs off on the barrel 's bore making it slicker, too, up until the time when the bore is as slick as the bullets. By the time the barrel is fully "conditioned," it's hard even for burning powder to stick to it. Most home bullet coaters also coat the barrel, which cuts down on -- or altogether eliminates -- the number of shots needed for conditioning. Slick Silver is electrically bonded to the bullet so I can't say whether it rubs off (or slicks up the bore) but my hunch is it doesn't.
There's an industrial company in Colorado that has a great introductory offer on hBN. One pound is $49. Mine was $58, delivered. That compares pretty well to Lower Friction of Toronto's one pound which is $99, shipping extra, which used to have a monopoly on the non-industrial/hobbyist market before ISI.
Industrial Supply Inc is selling the pound as an introductory offer hoping to attract industrial business (hBN is an amazing hi-temp, hi-pressure lubricant) and they even have to fill out ISO9000 paperwork for every pound they sell. Once enough shooters/reloaders have cashed in on their offer, I fear they'll realize it was a marketing mistake and start requiring proof that you're an industrial concern. Bottom line, get it before it's gone.
A pound is a lifetime's supply for four or five people so you can buy a pound, sell three ounces to each of four of your buddies for $20 per, pocket $20 to cover your time and labor, keep your four ounces free, and all of you actually got a good deal.