That picture is worth putting in the Ammo Oracle website. Thanks to whoever took the
time to do this test, then assemble the results into one picture.
However- I've noticed when keeping track of flash that it does vary alot
from round to round. A 100% accurate test would have sampled a few
shots out of each type. The FH vs. no FH are dramatic enough, but Phantom
vs. A2 vs. Vortex could have used a few samples.