I am thinking that even with protection 000 buckshot will rattle the teeth in my head. Each pellet is a .36 caliber ball.
I am big on safety gear in all pursuits.
My hearing took a beating from the wind whistling through motorcycle helmets when I was younger. I especially need to conserve what is left of my hearing.
The only times I shoot without protection is the occasional guinea/chicken alert and I grab a gun and get a shot at a predator.
http://www.shotgunworld.com/shot_sizes.jpg
Shotgun Ammo and more Shotgun Ammo! ShotgunWorld.com is Your Best Source for Shotgun Info on shotgun ammo.