Actually here's what I think would happen.. And I could be totally nuts.. But I think the first generation would look black copper but carry wheaten.. The next generation would have a mix of wheaten and black copper and all black coppers would be "project" birds because they would carry wheaten which you don't want in black coppers.Well I've never tried it! That's just what I thought to be the case. Hoping someone who's tried it or something like it can clarify a little more. Snowbird?