Get something that finishes at .685 - .585.
My hunting rig is a 6.5 w/ a 22.75" McGowan in Savage Magnum (barrel weighs about 3.25lbs w/flutes) I've been all over with it and it's a bit heavy at 11lbs w/ scope and Can hanging off the end. I did run it with a chassis at one point and it...