often the book by the component manufactuer is better
Often the book by the component manufacturer is better.
The newer book is almost always better than older books.
The more specific is usually better than the less specific.
Ed Matunas did very good books - I still like the Lyman books myself but often need loads such as 260 grain bonded bullets from Nosler in the .376 Steyr where only the component manufacturer if anybody lists the specific load. Sometimes it pays to find the load in a new book then buy the components.
There are exceptions. FREX - although it has now been changed in #13 - Speer listed many loads for handguns using their bullets and 2400 powder with poorly chosen primers in earlier books.