As I recall the larger muscle brake was designed for the really heavy barreled guns.
ELE or the 460 X 510 has a 1.250 barrel. The barrel I sent to Jim is only .750 at the muzzle. With a 450 hole (458 Lott) through the center the larger brake may not be the best choice. Very light weight hunting weapons (7 pound Lott?), in very large calibers require maximum braking.
SO shortly I will be trying and seeing the difference between the 3 port and the 4 port.
My opinion; to see any difference in recoil one must go to a cartridge that holds 90 or more grains of powder with this 4 port brake.
ELE shoots a 450-750 grain bullet. http://www.youtube.com/watch?v=Kkpt6...eature=channel
large 4 port muscle brake.