with such beautiful potential why would you slate such rare and special birds for consumption. First of all they mature very slowly, meat breeds are bred to mature very fast, like Cornish rock cross. You have real showroom potential in those Brahmas, Please consider selling them to someone interested in showing them, and buy chicks that will mature faster and give you better meat value.
While I agree that meat specific breeds would be a much more efficient conversion of feed to meat. Most of these experimental color Brahma varieties are a long way from being show worthy, type wise.