You can also adjust it to tune your barrel harmonics to different loads for better accuracy. You have to shoot a lot of rounds to try the different settings and find the right one for your load. If you reload, it's probably just as easy to try different loads and find one the gun likes. If you're only going to use factory ammo, the BOSS gives you some flexibility to adjust the rifle to the factory load.
I shot mine ONCE without hearing protection while hunting and I'll never do it again. Pretty sure I suffered permanent hearing damage from that one shot. I took the BOSS off the gun and got a BOSS-CR which doesnt' have the holes so it doesn't reduce recoil at all, but you can still adjust it to tune the gun and it's no louder than a regular rifle.
I'll never buy another gun with the BOSS.