I've always enjoyed the Propellant Profiles section in Handloader. I finally decided to buy the book. Found one on one of the resellers websites and ordered it. I guess it goes back to the very early days of Handloader and covers just about every powder I've ever heard of except those discontinued many years ago. Not all of the newer powders are covered which is OK with me since my supply doesn't include new powders.
To me it looks to be a good addition to a load manual. I have always wondered about the various powders that are included in a list of loads for a given bullet(boolit). The profile gives a little more insight into advantages/disadvantages of various powders.
I'm sure most experienced reloaders already know most of what is covered but since I started somewhat late and have read enough online to develop a healthy suspicion of what I read on line, additional published information is welcome.