Finnished my first muzzle brake last week, didn't want to post anything until results were in! Managed to get out to the range yesterday and fir a "volley" of rounds downrange. Not for accuracy , simply a function test. The brake itself is made from forged 4140 normalised steel ( heavy truck air brake "s" cam ) the shooting end of it was surprisingly good. Full power 375 Win from a 14" contender and a 230 gr NOE RCBS clone the best I can tell is only about 1-1/2" of muzzle climb and out to 100 yds , still shooting to the sights.