I have a .308, Savage Varmint action, Shilen barrel, DBM and Manners stock. What I would like to do is to put a magazine in it with more than the four rounds. I know I can purchase modified mags for a couple of vendors, but I would like to use 10 round mags, if what I'm saying makes sense. How do I go about doing it? Bottom metal changes? Different stock I letting? What do I need to know and do?

Thanks people....