fitz and polledbull are right on use a continental on those black/bwf cows, great mother cows. the black sim/limo/char will give you hybrid vigor and great performance. you can get calving ease with most breeds if you tell the breeder what you are looking for. remember most times you'll give up some performance for calving ease (most of the time). just starting out probably go with calving ease first then go from there. On our commercial herd we have black/bwf mothers also and use the black char bulls, if interested in seeing the calves go to web site and look under commercial calves.