I served as a Ballistic Tech. at one point in my US Army career, and have fired all sorts of heavy weapons. The loudest ear ringers that I experienced would be the 76mm main gun on a tank (Super sonic crack), The old Quad 50s anti aircraft guns and the M-106 recoiless rifle. And You have never heard a real noise until You Have fired a 4000 round burst through a Vulcan.

Good Shooting

Lindy