What is the heaviest bullet weight that one can "accurately" fire in a .308 Win. with a 1/12 twist, 26 inch barrel, and the projectile still remain stable at the magical 1000 yard range? The reason I'm asking is that I have 450, 210gr. Bergers left sitting on my shelf after I sold my .300 Win Mag Sendero, and wondered how well they'd do in a Rem 700VS. I am assuming a muzzle velocity of 2400 fps. Thanks for any comments!