Re: Quick question....
A muzzle brake is for reducing "felt" recoil. It can help in LR shooting by making you less nervous every time you pull the trigger because the rifle wont hit you as hard. This is accomplished by diverting gasses to the side of the barrel instead of all the gas exiting the front.
Long range shooting is a process that ends with a result. Once you start to focus on the result (how bad your last shot was, how big the group is going to be, what your buck will score, what your match score is, what place you are in...) then you loose the capacity to focus on the process.