The brake I use on everything except 338 and the 50 is a Miculek. If you or less than 30 cal. get the 1/2x28 AR-15 brake, and when they thread the barrel then they will install it and enlarge the hole/bore of the brake to the proper size while it's chucked up in the lathe. Purists say this is the best way because a predrilled brake could not be inline with the threads. My gunsmith said it is actually pretty common. If the muzzle brake is not perfectly centered it will screw-up the bullet flight. And a few thousands will really affect the group. What I was talking about with inconsistant pressure on the forend was sometimes people will hold down harder on the forend and the next shot loosen up a bit and go high. With a good brake you don't even have to touch the rifle forend. There is not a quiet brake that works, my experience has been the louder the better. If it's not redirecting the gases it's not working. Here's a pic and a link to the 338 brake I had built, it's amazing, but a 91lbs of felt recoil rifle needs a brake. But you can get 3 Miculeks for 1 of the custom built brakes.
Here's their website scroll down Home