The elk industry is enjoying amazing results from selective breeding. The increase in velvet antler weights is truly phenomenal. How antler genetics actually work is still a mystery in my mind.
Some genetic matches fail to produce significant gains, while others produce amazing results.
Human male pattern baldness works this way. These kind of sex-based heritability variances have been seen in the horse racing industry. If the great bulls are a result of the dam, then we are misleading ourselves. They pack on the weight. I strongly suggest that a new breeder purchase cows with a proven track record.