Brahman cows, due to placental regulation, can restrict the size of a fetus, thus resulting in smaller birthweights. i did a paper a few years back about brahmans and thats one thing i got from the study i was reading. it also said that brahman bulls can often throw quite large calves when crossed. in my area, i would probably rather have the brahman cows and a hereford bull although the rustling ability of hereford cows allows for an equally desireable cross. the reasons i would have brahman cows instead is b/c of the small bw, i like brahman cows, and i could use a hereford bull on another herd i have. however, it might be more economical to purchase hereford cows and a brahman bull b/c they are cheap around here.