CapDavid,
I think that there is little difference in the value of the various loading manuals.
What I consider important is which manual lists loads that compare favorably with the results that you actually get.
You can do this if you have a chronograph.
I spent most of an evening checking the loads of Sierra,Hornaday Speer,Lyman and Speer was the closest to listing loads that I,myself,shoot.
I bought the Speer #12,as a new update.
Frank


Frank Earley