Re: Reduced Flash .357 mag powders?
The least amount of flash I have ever gotten from heavier loads in a handgun was from VihtaVuori powder. In the .357 Mag, I have had good results from V-V N350. Haven't tried any V-V N110 yet, but would like to get some and give it a go.
In the .40 S&W, I used to use a lot of Alliant Power Pistol, which was pretty clean, very accurate, and the burn rate matched the .40 well for bullets from 155 gr to 180 gr, but the muzzle flash is pretty impressive with that powder. I tried the V-V N350 in the .40, but I think it might be a tad slow for that cartridge. Perhaps, if I ever run across some, I might try V-V 3N37 in the .40 cal.
All of the Vihtavuori powders I have tried so far have been very clean and pretty darned accurate - - so long as I pay attention to the burn rates, relative to the cartridge I am loading for. Some of the biggest problems with Vihtavuori powder (around here) is continuous availability, which is spotty, and the cost, which is higher than Hodgdon, Alliant, Accurate, etc...