info on .25/7Rem/mag?

[mossman]

Glad to find this site.
I am rebuilding a Mark V Wby. (formerly a .257 mag.) into a .25/7mm mag. (.257 Cheapskate) in order to get around the high cost of Wby. brass and fireforming. I would appreciate any info members might have in regard to case formation, dies, problems to look out for, and general comments. Kreigar barrel (28") enroute and chamber reamer likewise. The Wby was sweet, but barrel shot out. A lawyer gave me the gun, guess they are good for something!