Hi mate,
Have a look at this website http://www.6mmbr.com/index.html, on the left hand side it lists calibre info, it gives loads of information, bullets,primers,powder for target and hunting in all the popular rounds. Also look at the articles archive,some interesting subjects.I only started last year,but with patience and info of friend I've built up enough knowledge to reload accurate and safe rounds.
The main thing I have learned is not to buy cheap equipment, with a good press,good dies,good brass,accurate scales you're cutting down the variables and therefore will make a more consisten