I would be wary of the forward muzze brake stuff. a regular muzzle brake is hell on scopes as it is, more forward motion cant be better.
fwiw, i shoot a 30-378 with the accubrake, its one of the most efficient brakes i have used, and i have had to fire without ear plugs...not a smart thing to do. the thing i hate about having ear plugs in tho, is you cant hear the thud of the bullet impact.