I have been fooling with Corrientes for over 30 years, raising pooled, black calves from them. I make more money with these, then anyone can with any other type cattle. BUt, I will tell you a Brahma x Corr is just about worthless. A straight Corr calf would be worth even more as roping stock. I have met one man who did this cross, He is a stock contractor for junior rodeo. Or high School rodeo or LIl Britches..I can't remember which. He wanted to come up with a smaller Plummer-type bucking bull. If you want to get Corrr cows and be successful, sell the Brahma bull and get the best registered Angus or Brangus bull you can afford. You don't have to get all solid colored Corr cows either if you have a good quality, homo for black and polled bull. Even better, no more than you will have, just AI them to best Angus or Brangus bull on the market.
But if your heart is set on raising Br x Herf heifers, then do what
@MurraysMutts advised. You may can get 3 Corr cows for what a Hereford cow will costs. But, a Brahma x Herf heifer will sell for at least 3 times more than a Br x Corr calf will. An open, f1 BR x Herf heifer will sell for enough money for you to buy maybe 2 Hereford cows, or close to it.
If you have 10 or less cows, I would sell that Br bull and just AI everything. You can sell that bull for enough money to get some good Hereford cows. Heck, buy 2 Hereford and 2 Corr cows. AI the herf to Brahma sexed for female semen, and AI the Corrs to sexed for male Angus/Brangus semen. You can get $1500 or better for the black steers at weaning, and use the money to buy more cows. Sell those two for $3k, buy a good Herford cow for $1500, another Corr for $500, and you get $1000 to cover expenses that year. Next year , you will have 3 Ang x Corr steers, to sell for $4500, and 3 more Br x Herf heifers. Won't take very long to get your herd of f1 cows, and you won't have to spend too much more, if any, money over what the Brahma bull brought.