Exactly.
And knowing when you are testing you personal favorite muzzle device...
I can make the FC556 jump like a .308 with no brake and film it
You accuse me of having no evidence, I produce it. Might I ask, what is your evidence? Have you even shot any of the brakes I have tested other than the 5M1? You disregard this test because it doesn't produce the results YOU like?
It is not my favorite muzzle device. My favorite muzzle devices are suppressors, usually NT4 compatible ones. It is merely the one muzzle brake/compensator that I found has worked best
so far. I am always searching for better.
What do you want me to test it on next? An XCR? 20" AR? a 14.5" AR? A 5.56mm AK? (EDIT: the muzzle isn't threaded, no dice here) M14? An FAL? I'm fairly confident you'll see similar results. I can change ammo types as well. I can have someone else do the shooting. I can bench it. I ran that test the way I did because that's how I will really find the effectiveness of the device; standing, firing repeated shots. Frankly, it doesn't matter what I do, because unless the winner is your favorite device, it's a worthless exercise. I can't just indulge your ignorance.
While the effectiveness and results of a muzzle brake will change based on ammo and barrel length, I have yet to put a device on one gun that was worse/better than on another gun.
My testing was all originally done on longer guns (I have tried a LOT of hiders and brakes, believe me). I found out what worked on them, and what didn't. The test with the 11.5" didn't change much, other than making muzzle flash
much more pronounced, and really taxing the flash hiding capabilities of any given device. Having a light and short barreled gun accentuates the muzzle rise and the flash. Which is the best testing ground for what I was intending on accomplishing.