Yes accubrake andi already know lol I shot It once without ear protection never again. And recoil I love itIs your 30-378 a Weatherby with the Accubrake? If so you're in for a treat when you shoot at something without hearing protection. Yes it is ear splitting and if anyone tells you that you won't notice the sound when you shoot at a deer, they are full of it lol. The recoil isn't bad, surprisingly.