Because I use a lot of Hornady Bullets, I like their manual. The Lee manual is just a compilation of info from other manuals. Since W231 and HP-38 are known to be the same powder, I assume the Lee info is old. I have the Speer manual also cause I use a lot of their bullets also, but find their info and Hornady's are similar. I use the Hodgdon website quite a bit too....never heard of Hodgson.