If your concern with muzzle flash is for defensive shooting reasons, that will eliminate several types of defensive ammo. Hydrashok has a pretty good flash as does Speer Gold Dot. The loudest, biggest, and brightest muzzle flash I have seen comes from Aguila 117 gr hollowpoint ammo. As for ball ammo, Blazer has a hefty flash, but as I recall, Fiocchi was more subdued.
Keep in mind that flash can occur in different manners. When the flash is of yellow color, it won't be as bright, although you may have a large flash. White flash can be quite blinding. Aguila 117 gr has a huge white flash, almost like a flash bulb on a camera.
If you shoot at night with a flashlight (you really have to ID that target before you double tap it) you might want to check out how much smoke your load puts out. On a humid night, it can be amazing with a bright flashlight. You won't be able to see through the cloud of smoke to shoot again.
What is the purpose of having low flash? If you shoot at night you should be using a light. The flash is not that noticeable when you have a light on.
I do a fair amount of night training and a flashlight is the only way to go for me. You have to be able to see what you are shooting.
"What most of these people need is a good slap upside the head. What I don't need is any more lawsuits." John "The Tooz" Matusak