I have the same rifle, it can kick some fierce with hot loads... Instead of a muzzle brake why not put a good recoil pad on it? Something like a Pachmayer Decelerator like I have on mine, or one of the highly touted SIMS ones. It made a big difference on my post surgery shoulder. For shooting from the bench you might even want to wear a Past mag plus recoil shield. I find that when hunting and shooting offhand I dont even feel the recoil, it's when sighting the rifle in at the bench that it hurts. Those muzzle brakes are so dang noisy!
Troutseeker