True, but in my admittedly limited experience with ported barrel .44 mags I haven't found that they do much except reduce barrel flip a bit. Of course I don't have any experience with a .50 S&W, and they may have come up with a more effective muzzle brake for that monster.
54 ft lbs of recoil, wow. And to think I have heard guys at the range complain about the 6 ft lb recoil of their .45 1911's!