I have a savage 10 fcp hs precision chambered in .308 with a nightforce 8-32 with a 20moa riser. I am currently shooting 168 gr sierra matchking BTHP with 42.5gr of IMR4064. Shoots great out to 750 yards but would like to shoot out to 1000. Now I am thinking about rebarreling with a shilen savage replacement select barrel chambered in a 6.5/284 or .260. What size barrel should fit in my stock? what barrel length and twist? Is the replacement barrels as good as having a gun smith cut the chamber and thread? Should this be alot more accurate than my .308 barrel? I am also going to replace the trigger and glass bed the hs stock. I just need some suggestions on what the best route would be.