There is no way you are destroying a nightforce by shooting a muzzle break on an 06. If you get one of the better nightforce they have been proven very durable on 50's and 338's by the military.
That's good to know. I gave up the 7mm Mag Because of shoulder problems. I now hunt with 6.5 , 7mm mauser and 30 30 . Where I live that hasn't been a handicap, I just need to get closer to make a good shot. But we will be moving to AZ soon and may have to rethink that if I'm hunting on more open ground. DRI've put a few hundred muzzle brakes on rifles and never had one bust a scope.
Also, if you are recoil sensitive, one of the best recoil reducing brakes on the market is the VAIS muzzle brake. It can reduce recoil up to 50% depending on the caliber. I've mounted a bunch of them and everyone loves it.
A friend of mine had two identical Ruger M-77's one was a .308 and the other a .300 Win Mag.
The .308 was his wife's, they both deer hunt.
We put a Vais brake on the .300 Mag and she shot it.
And claimed it. She said that it kicked less than her .308.That right there says a lot.
You can buy them online at Midway USA. Just make sure that you get the right diameter for your rifle barrel and have a competent machinist install it.