Re: RCBS Die Broke
The only thing a neck die does is size is the neck. Check your shoulder measurement with a headspace guage and you'll see that distance is longer than a once fired case. I bump shoulders back between a .001" and a .0015" You are in the ideal situation to set that up right now. Since your bolt is closing hard take your bump die and start screwing it into your press small amounts at a time until you bump the shoulder back about a .001" If you don't have a headspace guage just bump it back until the bolt closes easy.
There is nothing wrong with only neck sizing 30 cal and up. With any case the shoulder will eventually grow enough to cause the problems Matt is having. There is also nothing wrong with FL sizing every time. The idea behind neck sizing is to help keep the cartridge fitting into the chamber as tight as possible, this helps eliminate movement of the case and improves accuracy. If you have your own reamer cut you can have it set up to match your FL sizer die and when you run a fired case through your sizer it will resize the case within a very close tolorance of the chamber.
You can buy a bump die for $20 or so and be back in buisness or else get yourself a bushing die which will set you back about $100 with a good bushing. Even the bushing die will somewhat FL size the case but you can adjust how much of the neck you size, only size about 3/4 of the length of the neck and the unsized portion will help center and hold the case in the chamber. In my match guns I always FL size with a bushing die, in my hunting guns only partially neck size until the bolt closes hard then FL size just so I can bump the shoulder back.