Waterman
In Ackleys loading book he states there is a problem fire forming post war brass. He recomends forming new cases from 30/30 or 32 special. He compares it to the 250/300 and 257 roberts in performance. Once you form the cases they will give you long service which should absorb the expense of the loading dies and effort. i have yet to loose or trim one of my 7mm cases. Been using them as long as i've had the gun. Being a takedown it should be easy to start with a chamber cast. I would use the 30/30 so i could turn the necks.
lots of luck
Tom
