I have a box of new RWS brass that I'm going to use to try and modify for a Springfield Krag that has been rechambered to something like a Rimmed 30/06. Blaser is the best case to cut/resize/fireform to fit the chamber. I will give you the mesurements.
OAL 2.678"
Rim 0.527"
base 0.478"
rim to shoulder 2..10"
neck length 0.240"
dim. @ shoulder 0.439"

Hope this helps