Ok, I'm wanting a short .308 to hunt with. I currently have a R700 pss with a 26" barrel in a aics with Vortex gen I razor. If I cut the barrel to 18" what bullets will I be able to stabilize with the 1/12 twist? Secondly is there a folding chassis I can switch to that will save a substantial amount of weight? I know there are tons of scope that will fit the bill of what I am looking to do better than the Razor. Let me know your thoughts, thanks