Still waiting on my books and I have been doing some reading and downloading information from manufacturers sites. The books is the main thing that I would be getting my information from but I only have the internet for now until the books arrive. One things that I have either missed or its not shown is when using Hodgdons site http://data.hodgdon.com/main_menu.asp if you pick for instance Pistol then 357 magnum and whatever powder/bullet it does not show primer, however if you download the pdf chart for reloading they show primer (Manufacturer/size and number) and magnum or regular primer. Does anyone know how they are suppose to know which primer is used when using the online version? maybe I just missed something.