Colburn Primo is arguably the hottest Black Angus bull right now for the show stock breeders. Many of the leading show cattle folks are using him or have calves sired by him, and as Boot Jack mentions they are winning state, regional and national shows with his offspring. If you are breeding for show cattle, he is certainly one of the ones to use. But if you are breeding to raise steers or replacement heifers, that likely is another story. His docility EPD is horrible, and he is still unproven.