By the way, for another manual.. I love the "Loadbooks". They are typically dedicated to 1 caliber, and have data compiled from numerous sources, and have a wide variety of powders, bullet profiles, etc. They run about $7 each on Midway(but of course they are out of stock at the moment). I have one for all the calibers I load and like them.
I typically use my Lyman and a Loadbook to check my data. You can also see this site, which is again a compilation of data from powder companies (use caution though, as this site can also allow users to post data... but it's clear when data is listed on a powder manufacturers website and what is user submitted.)