I have had the old Lyman cast bullet book for a many years now. But was reading that the new Lyman 4th addition cast book had new information, loads, as well as Loads for molds other than Lyman. Now if you do not have a cast book, I would recommend it, and I have not read threw the entire book as of yet, And there are a few loads for none Lyman molds, I did see a couple for Lee and Saeco, and they have added a couple new loads, for the Lyman molds. I cannot put my finger on it, but there is also something I do not like about the way the book is formatted.
I am not saying this is a bad book, and from what I have read, this book dose seem to be less technical and more too the point, an easier read. But not the great improvement and new information I had hoped for. All in all if you do not have a cast bullet book it’s worth the $18.00.