An 11 pound 300 win mag wouldn't be much different than a 8 lb 7 rem mag. You can compare recoil here:
23-24 ft/lb of recoil was what I got with the heaviest bullets for the 300 win mag. That kind of recoil wouldn't phase many of the shooters here. Depends on your recoil tolerance.
I understand that using a brake is more than just reducing recoil, it may allow you to see your hits and recover faster for a second shot.
Crunch some numbers of rifles you are familiar with to see where you stand. Personally I an not fond of much more than 40 ft/lb.