Jerry V Lapen commented about blackpowder rifle barrels made by Ed Rayl. Ed Rayl is one of the top blackpowder barrel makers for rifles and front end loader shotguns. Two years ago, I saw a couple of completed shotgun barrel assemblies in the white made up by Mr. Rayl. If I remember correctly, the pricing was in the $300 range (front end loader). From my limited experience with black powder firearms, it's a low volumn cottage industry - similiar to our Lefever project.