I am still fairly new to reloading. I did it when I was younger with my dad but am getting back into it. I bought a new savage 7mm rem mag. I have some 162gr Hornady SSV's, leftover IMR4831 powder, and Federal 215 primers. I was told to get new brass instead of reusing the old 7mm brass that I have. What brass maker should I get? What is the correct procedure for reloading new brass? Does it have to be FL resized or sized at all? Do I need to trim them?