My Speer #11 is copy write 1986, the Hornady, 1991. I spoke with the Speer tech support guy last night and he says the data is obsolete. I think I should take his advice. I know I want/need the highly recommended Lyman cast boolit hand book, but what else are you folks using? I considered the caliber specific manuals since I don't really load a large variety here. Just the usual, popular rifle and pistol loads. What say the collective, whats your go-to favorite cook book?