You will gain a great deal of painful noise that you will pay with both your hearing, and those around you.
I was walking up a trail one day with a buddy walking behind me. He spotted a mule deer on the top of the ridge, and shot (he missed). His muzzle was level with my ear and maybe 4 feet distant, but pointed about 60 degrees away. He was a little afraid of the recoil of his 7mm RM, had a muzzle brake installed. It was painful, and I couldn't hear anything for a while. He was never invited back to the elk camp after that day.