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Good comparison.
I run a vortex and its awesome for killing flash, this shows it.
matches up with my own testing, I used a bored out 5.56 Vortex (spiral) on a 16" Remington 788 in .308, still no visible flash. Once Smith solved the loosening problem and the undercut prongs it became a great design.
Looks like the Blackout deserves it's name.
"Every step we take towards making the State our Caretaker of our lives, by that much we move toward making the State our Master." Dwight D. Eisenhower
What is the theory behind flash suppression and how they do their job?
Protects night vision via reducing flash.
Not being in a lab doesn't hurt. The tough thing about photographing muzzle flash is recording it consistently from shot to shot.
A typical video camera runs at 24 frames per second, with a per-frame exposure that's quite a bit less than 1/24th of a second. The peak of the muzzle flash might coincide with one exposure, or it might fall between frames.
So, how to measure muzzle flash with a camera? Either use high speed video, or use a cheap camera and record lots and lots of shots until you have a statistically significant sample of frames that may or may not have fallen on one side or the other of the brightest part of the flash.
Oh no, not another lube thread! Read this first: Lubrication 101.
Although this is not a high speed video, it was done by the same folks and creates a greater feel for the flash characteristics (from various perspectives) of some common muzzle devices:
http://www.youtube.com/watch?v=ggfyDANbD6U
After watching this, you might want to choose the Vortex over the Blackout (if flash suppression was your sole concern).
'That whole effort was held together by sweat, shame, and a tiny bit of pride.' -- Son of Commander Paisley
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