Tell you what:
I have a 308 on a remington action, not heavy but not light. I'll put a brake on it and anyone is welcome to try it out, with and without the brake.
You'll see what I mean about being able to spot your hits and stay in position.
Sure its loud, so is a 22 if you don't wear ear protection which anyone would be silly not to use, regardless of what your shooting.
I don't notice the noise on my 375 H&H with the brake, but I sure notice the recoils nad the lack of ability to stay on target with out it.
But like I said, best thing to do is try it. My offer is open to anyone who what to try a brake.
CPT USAR Ret
USAMU Sniper School Oct '78
Distinguished Rifle Badge 1071