Quote Originally Posted by brownb56 View Post
They work but I am not impressed. The bore on the brake is oversized when compared to other brakes. Allowing too much gas to leave straight out the muzzle instead of forcing it out the ports.

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My experience also.

I took one off of a .338 Win Mag barrel. Measured .375. Harrells recommends .020 over on the ones they sell.

Yes, it worked, but not as well as it could have. Be that as it may, it's a cool idea.