1/2 of our Simmental herd was bred to Grandmaster. I would question the accuracy of his EPDs. Our birth weights ranged from 70 to 115 lbs. We bred to some heifers feeling that his EPDs suggested that he would be safe to use. We spent many nights watching the heifers. I am not planning to bred anymore heifers or small cows to Grandmaster. The calves expressed more bone, width of shoulder, and square shape of head which caused some calving difficulties - some required to be pulled. I would also question the structural correctness of the bull, many of our calves are bold and straight shouldered. In general, the Grandmaster are nice calves, but we have other sires that are out growing them.