The advice on getting a manual is very good. I think when you get done reading the first one you buy, you need to buy a second one. I use five different ones just to cross reference with. You will notice different minimum and max load numbers in the manuals. Also use the internet for reading material ... such as the link below. I printed out some of their pages to keep on my reloading wall for quick reference ... such as cartridge length (max and trim to)... they also have a conversion chart that I have found useful.
http://www.reloadbench.com/main.html
Good shooting ... be safe ...