what i know about Sooner is that if you use him the wrong way, you won't get the kind of calves you want. you have to breed him to real squatty, dumpy style cows to get something good. to my knowledge he is not a moderator...hence, i would venture to say that one may need to be careful using his sons. ...i have seen this be the case with legacy pluss, so it may be a through back to his genetics.