Those Bysantin Half-bloods were pretty cool. Made good mommas, some of them. He could throw that "ground sow" look...amazing rib circumference, etc..
His drawback was calving ease and breeders didn't mess with using more of him after the reports came in. Those early breeders were concerned with trying to lower those birth weights. Many modern pedigrees though, show him to have been a good foundation bull. You will see Bysantin half blood cows in pedigrees frequently as
the base foundation, because he also was the first Maine-Anjou bull imported to Noth America.
Cunia first became popular because of his calving ease, even before his females went into production. I was never a Cunia freak like many club calf and some breeders are today, but he offered many good traits. Owned a cow that went back to Cunia twenty- one times in her extended pedigree. She won many shows but could not get her bred.