From what I understand, muzzle brakes don't really reduce recoil. They don't reduce the push back into your shoulder. They reduce muzzle rise by directing gasses in a manner that counteracts the muzzle rising which allows faster follow up shots, and easier self shot spotting. There may be some brakes out there that directly reduce the 'push' into your shoulder but I would think that would mean directing gases back at the shooter, for that to happen. I wouldn't exactly want hot gasses and unburnt powder directed at my face. The actual weight of the brake may slightly reduce recoil by adding 1lb or so to the rifle, but the brake itself, is usually not designed to reduce the 'push' which is what tends to bother people's shoulder the most. If flinching is a problem, a brake could potentially help since the gun wont be jumping up as much, but as far as getting the sore shoulder, I don't think most brakes will make that significant of a difference.