Mr. A - The best SD ammo I've found for 9x19 in terms of flash is Speer Gold Dot 124 grain +P. I shot it in an IDPA night match (using up my old carry ammo) and there was a small, dark orange ball about the size of a tennis ball. This was out of my CZ-75B with a 4.7" barrel; might be more flash from a Steyr.
A friend was shooting warm .38 Super loads with 231. He got a white ring of flame about a foot in diameter with each shot.
A friend was shooting warm .38 Super loads with 231. He got a white ring of flame about a foot in diameter with each shot.