The sound meter in my head says my .22 is mostly quiet but the .270 Axis is frigging loud. More so when I fired it for the first time. Laying on a foam mat in the back of my truck. Truck has a canopy on it. That was the first time I had ever heard a high powered rifle shoot. I now have ear plugs and ear muffs to go over them. After that first shot, I knew I needed to fire from outside the truck and rested the bipod on the fender instead.