I assume you subscribe to
Handloader magazine. If you don't that's the first place to start. You'll learn more there in a few issues than the next 50 places combined, at least more cheaply.
I use Rooster CFL for case forming. Since you're only sizing down .020 it should be pretty easy. You can probably just size down using the standard sizer/decapper die in a normal set. If that's too big in a single step (crushed necks), use the decapper die from a .270ish size range to make an intermediate step down (neck only).
You'll most likely have to turn the necks, and I'd anneal them (see Varmint Al's website) and get ahold of Sinclair International in Fort Wayne, IN for equipment and to answer any techincal equipment questions..
www.sinclairintl.com
When you read about case forming, it sounds like rocket science, tons of steps and all that. I make .357 Herrett from .30-30's. Shorten by .200, size up to .35 from .30, reform the shoulder, anneal, and fire form. Sounds complicated but it's a piece of cake. Really is and actually fun, and I hate picky, tedious stuff. Neat part is that other shooters think you're some kind of god because you reform pieces of brass.
If you're not up for this type of fun, you can buy 6.5 brass from a number of sources listed in
Handloader
