The brake definately tamed the recoil on my K31. With this brake, and a butt pad, I'd say it's about the same as my Swede mausers now. Gun is definately much louder. You WILL seriously damage your hearing if you don't wear good hearing protection. I've been using internal foam plugs, plus good ear muffs. Everyone within 4 concessions of my house knows when the Switzerland gun goes "bang-bang"!
dave