I had a 30.06 with a twist turn on turn off brake and I can tell you I only fired it once in the field ( I don't like muffs or plugs either) with it open and it was very painful. I turned it straight back off and NEVER used it again as recoil wasn't really an issue and I didn't buy it for the brake it just came with it. It was lucky I could turn it off rather than have to unscrew it as it made it a bit easier to not have to put up with it.

Steve