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...