I have been using a brake on my 300WM for the last 7 years, mainly to reduce muzzle rise and recoil. I have 2 barrels in this calibre and the brake is very effective at its job and the gun is easy to shoot. However the noise is deafening and ear defenders are a must. The first barrel is a standard spotter and that is my go to gun for stalking and driven hunting. The second barrel is a Semi Weight with a very low shot count, less than 50 rounds. Without the brake I was getting a 3 inch group with both barrels. With the brake I can get 3 shots touching with the 4th and 5th braking off by an inch.
recently I toyed with the idea of removing the brake for stalking as it is cry anti social. Using Barnes TTSX 180gr the groups tightener up by 50% with the Semi Weight Barrel. The Gun is quite heavy and I started to get really comfortable with it. Tonight I will try it for boar and see how I get on. But, for driven hunting I will stick with the brake. The ear defenders are still a necessity as I value my hearing. All the best