I know it's been a while, but we finally got one completed. This one is a 27" X Caliber carbon barreled 300 RUM with a Defiant action and and MDT chassis. The mag well was machined to 3.85 to take the longer mags so the new 208 Berger hybrids can breath. The suppressor is the new Magnum offered by silencerco. Doing the break in so if you guys have any load data that might correspond with this build.... please fire away.