RE: A-bolt 300wsm with the boss?
You'll never notice the loudness hunting....it just never happens and we never shoot that much hunting.
About the accuracy:
Independent tests have confirmed that the boss does indeed do what it's designed to do. It actually improves accuracy. That said they then removed the boss and shot the A-Bolts with nothing on them and they found that accuracy was still excellent. As a matter of fact the accuracy was so good that the boss contributed very little to the overall functioning of the gun.
We don't see them attached to varmint rifles and we don't see them at benchrest matches.
Remember the hacksaw comment?