I would seriously concider the Sendaro. I have a .300 ultra mag in a stainless BDL, and after 20 rounds my shoulder is tender shooting from a bench. The added weight will lessen the recoil. With the BDL your looking at 45ft.lbs. of recoil energy, comparable to a .460 Weatherby with a muzzle brake. I shot mine using one hand to grip the rifle on a bench rest, the recoil was enough that the knurled bolt handle removed some skin off the side of my trigger finger. I've seen another post on a different board where someone claims a friend knocked ten teeth out shooting an ultra mag, where the *&#$ did he have his head! I installed a Vais muzzle brake on the BDL, muzzle blast isn't any worse, and it tamed it down to where I can shoot it without holding the front of the stock down while shooting off a rest.
Good Luck with your new rifle