I have a trued stainless 700 action with 26" Krieger, 10 twist barrel w/ 3 port side discharge muzzle brake that measures 0.80 at muzzle. Its chambered in 300 RUM. It also has a sako extractor and over size bolt knob installed. Barrel was a 308 win with 400 rounds then rechambered to RUM with 75...