marshman your father talks a lot of sense, and over the years I have done just what your father has done,i bred off the average because they came from top class lines / workers, and there sire / dam were no longer around, I have come across a nugget pairing a few times and back then I had not got the room to repeat those mating's as I bred for my own use, I been to game fowl shows, and any thing that concerns gameness in an animal I have mixed with people from all over the world at these shows, and most have said they done just like what your father has or had done, ( like myself) if you do