Did you see this thread:
http://www.24hourcampfire.com/ubbthreads/ubbthreads.php/topics/4084914/JB_6_5x55_Which_140gr?
It might help you...
I've got a commercial Mauser action I'm having barreled with a 29" SS Krieger Light Varmint Contour 1-in-8" twist barrel chambered to this old standby. Can't wait to stretch her legs at 600+ yards!
These two threads are definately going to come in handy...