I had Barnes bullets install the brake on my 300 RUM and it works very well. I carry ear plugs when hunting anyway so the noise doesnt bug me. I have shot it twice at 2 different deer without putting in my plugs and honestly did not notice that much more noise than my old 300 win or 7mm without a brake. Amazing what adrenaline will do.
I will warn you not to shoot across a hood of a truck with a bug shield or small crack in the window.
