Re: Neck Turning Question
First off, I wouldn't recommend neck turning unless you've got a tight chamber or at the very least are planning on using a bushing competition neck die. If you've got a custom tight chamber then you'll want to turn your brass to .0015" - .002" smaller than your chamber. I wouldn't go smaller than .012" neck thickness if I could avoid it, and definately no smaller than .010" or you'll start tearing case necks as you turn. Generally speaking, you'd buy some (good) brass, see how much outside neck turning it takes to clean it up with about a 10% cull rate, seat a bullet into it, measure the neck diameter and order a barrel .002" larger. Most of us get the barrel first and adapt, so don't feel bad if that's what you did.
I'm sure most of the folks on this board will recomend the Sinclair outside neck turning tool. It's very precise, but slow. Personally, I like the Forster case trimmer with the outside neck turning attachment. You can hook it to a Skill Twist or similar power screwdriver and save yourself hours of hand cramps. The Forster is very precise if you do your part in setup, and is similar in price to the Sinclair tool if you already own the screwdriver.
Good Shooting, Coyoter
All it takes is One Good Shot!