i have owned only one braked rifle a 280ai with as kdf slimline brake. it was a dream to shoot and not noticbly louder although you could notice the air movement on the bench. i have sat beside guys shooting abolts with a brake and been nearly blown off my stool. i think the brand and calibre have a lot to do with how much noise they make. some brakes are hardly noticable others are extremly loud.