I tried a brake on the range yesterday for the first time on my .308, compared to the Mod it usually wears the target picture was retained fully so that I could see the impacts at 600 yds, normaly the impacts are over before the sight picture is settled (without a mod the sight picture is usually one or two targets to the left

) I can with good technique equal the brake, but it proved to be a lot easier than the mod (wildcat ) I also have an ASE utra, much heavier but same general behaviour.
the other advantage was no heat mirage off the mod after a few shots.
the break didn't upset anyone and wasn't too much louder than the rifle unmoderated, brake was a pepperpot style cheapie, and I was impressed at its effectiveness (in fact I was impressed it didnt fly down the range at the first shot

I bought after reading a recomendation on here)