I have just replaced the muzzle brake on my .22-250 with a moderator. It is much less violent and I don't have to wear ear protection. The down side is that I can no longer watch the bullet strike.
My very basic understanding of the laws of physics suggests the if a brake was placed after the end mod in a single unit this would both attenuate the nosie and deflect the gas providing both a quiter report and more inertia enabling observation of the strike.
I think if it's possible then it probably would have already been developed.
Is this idea completely outlandish?