My Savage in 7mm mag Rem> came with the on/off brake. I worked up some loads and compared the on/off function. Brake operating (on) was a trip. Much less recoil. Lots more noise. Got rid of the cobwebs and spiders in my shack. Brake Non-operational, Lots less noise...recoil ok..as expected. What I did notice was significant. Brake on..rifle shot 1.125 inch. Brake off, 1 inch or a bit less. Sooo...I cut the thing off and recrowned it. Now I have a 22 inch barrel (I did before, just had an extension tube on it!) that will regularly shoot into .75 inch and depending on me will do better frequently. Sent it off and had the flutes deepened and now it balances like a fine shotgun. I hate to admit it, but this piece of plastic and gas pipe thinks it is a REAL rifle.