IMO, the move to go WSSM instead of WSM in a 25 was one of the all time biggest pooch screws ever!
A while back I had a rag around here with an article on the 25 WSM in it, if I could ever find it I'd scan and email to you if you wish. If, I can ever find it...
Thinking it might just be easier to do a 7 WSM and run 120's...
Dober