 Bolero was found to be most successful with daughters of Grande and Duellant.Breeders continue to cross the B-Line with the G- and D- lines to produce successful dressage horses, as well as those by Argus.The stallion sired 47 licensed stallions during his time at stud, the most important being Brentano I and II, Buenos Aires, Bismark, and Beltain.