It seems that all of the "Bore Rider" bullet designs you can get in molds predate powder coating. If you coat them they are too large to chamber.
I have seen examples of people who somehow manage to coat just the lower half of the bullet, and other where the whole thing gets powder coated and they are "Nose Sizing" just the upper half. All done by hand or with custom made equipment.
You can buy molds intended to take gas checks. Intended for Pan Lubing, and intended for tumble lubing. But nobody makes one where that "Bore Rider" portion is small enough so that it will still work after powder coating. Is there not enough demand?