"Originally Posted by dkf
Low flash powders can really help to cut down on muzzle flash. If I would shoot my outside range handloads (power pistol) at night I would probably go blind. PP is a very flashy powder in many calibers.
Jefferybehr here on GT posted some testing he did with powders at night with the .357sig but I can't find it. Some produced very little muzzle flash."
Perhaps the reason you couldn't find it was that you were looking for the wrong 'jeffreybehr'.
Here are the results of that research.
An EDC S&W M&P .45ACP. A dozen Glocks sold. NRA life member.
"If lethal force is warranted and appropriate under the circumstances, the" (defender) "must shoot until the threat ceases." Pinizzotto, Kern, and Davis, FBI Academy.