I posted on the Iowa State asking if they could tell me the reasons for no longer recommending the Ball Books and there is a reply. In a nutshell, the Ball Company has been bought and sold many times recently and subsequently updated their books with "Gourmet" type recipes, un-precise measurements, unusual ingredient amounts and have not provided any recent testing data when requested for review.
So, not saying the recipes are bad, just that they cannot state unequivocally that the Ball Book recipes are safe and tested.
So, not saying the recipes are bad, just that they cannot state unequivocally that the Ball Book recipes are safe and tested.