I was at a relatively dim range a couple weeks ago and noticed that 230grain Hydrashoks had excessive flash from a 4.1 and 5 inch barreled 1911s. Chuck Taylor's book Combat Handgunnery mentions this for hydrashoks as well. (wish I would have seen that before I reliability tested that load for 2 1911s!).
I know that Corbon touts low flash powder in their ammo, does anyone here know of any other manufacturers that do so?