I don't know about Gentry's unit, but I have seen some measured Sound Pressure Level data for the BP Tec that showed it was not louder. They have some theory of operation on their website.
http://www.bp-tec.com/They can also tune their unit in that you can choose how the recoil moves your rifle (straight in line with bore, etc.).
I have not tried one of these, but I would like to hear if anyone does. I know that theory and practrice are different, experience tells you how much. <img src="/ubbthreads/images/graemlins/wink.gif" alt="" />
jim
The BP bunch came onto Accurate Reloading touting their muzzle brake and how it doesn't increase the sound (or sound pressure). They started getting real evasive when they were pinned down on how their brake didn't increase the "level of sound" to the shooter. They finally drifted back into the shadows not to be heard from again.
To each his own, but I don't see why anyone uses a muzzle brake while hunting. I've never felt the recoil while shooting at the animal. This is from my 458 Lott on down. I most certainly have felt the recoil at the range. There I'll use a sissy pad and plenty of hearing protection.
The range where I shoot has a metal cover over the benches as do many ranges. The raport of the rifle is a darn sight louder to the shooter than shooting from an uncovered bench. None of my rifles are wearing muzzle brakes. It was my understanding from the BP bunch that the sound pressure wasn't increased, but why the heck was it louder to the shooter? This was when their story started to unravel.
