A local 'smith quotes his custom brakes at 175 and you can't tell where the brake meets the barrel unless you really try with something like your fingernail. He also claims 50% reduction in recoil. I have a 300 Win Mag and a .338 Federal. Neither really give me a problem with recoil even on a 50-60 round session at the range. I finally learned how to shoot. About 3 years ago I couldn't handle more than 10-15 rounds with my 30-30 and that was with a decelerator pad.