Just as the title suggests, has anyone done a test to see the effects of different muzzle devices on muzzle Velocity? Four instance is there a muzzle break that you could attach to a 16 inch barrel that would more closely give the muzzle velocity of an 18 inch barrel?
The answer to your questions is “no”. Unless you wanna talk suppressors. I have tested the KAC NT4 with 10.3” bbl guns and found it provides a ~45 fps boost.
I was simply wondering if a brake or flash hider could increase or decrease air pressure at the end of the barrel. The purpose of any muzzle device is to interfere with the escaping gasses, this would logically also have some effect on the bullets velocity, although possibly immeasurable.
A brake is on the end of barrel.
It uses gases which have already exited barrel, therefore can have no affect on velocity of bullet which has already exited barrel.