If you go w the MB, make sure you get a model that slides to a closed position or you replace break w solid. Always wondered if it changed POI any...
Muzzle breaks should only be used on the bench and even then, you will irritate people.
A custom rifle maker decided to make the rifle in .338 WM. They moved the accuracy std from 1/2" to 3/4" - of course, people wondered why ? Everything from too powerful, yada, yada but the answer had nothing to do w the gun at all.
The rifle will still group 1/2" or under but do to recoill, they gave the accuray guarantee a "helping hand" to protect fragile egos.
You might want to try the 375 HH or Ruger. For comfort - 9 lb or more including scope weight.