I have a Moss 535, 20 inch barrel with ported the turkey choke tube that came with the gun. The time only i shot it in the woods (see pic at left), the blast sound caused my left ear to register a very 'tinny' sound for about 30 minutes afterward. i assume this was from ultra-loud sound exiting the left-side ports and reverberating off nearby trees. Trees to might right were further away. I noticed the same thing with a ported muzzle brake on a rifle this past deer season. Another turkey hunter with a Mossberg 500 tactical short barrel mentioned the same, tinny ringing in one or both ears with his shotgun. He too has a ported choke tube that came with his gun.
Would a ported choke tube on a 26" or 28" barrel do this as well? Could this be due solely to the shortness of the barrel?
I have sound amplifying, noise squelching ear muffs for this season.