Muzzle flash is caused by the powder selected for the ammunition. Short barrelled 44 mags are often seen with huge muzzle flash, perhaps a foot & a half fireball from the muzzle. Under those circumstances, the little bit of gas from a ported barrel would make little difference. Choose ammunition with flash-suppressed powder, and you'll see a major reduction in the fireball. 357 & 41 magnums are the same way, you should see the fireball from my 649 with cheapie Winchester factory 357 ammo! I do have a ported 629-2 MG, and while I probably wouldn't spring for porting one, I don't see porting as a deal breaker by any means. I've had other ported revolvers, and really couldn't care less either way. Would some of you feel the same way about the older "Powerport" revolvers from the Performance Center? Oh, to clean the front sight, wipe it off with a cleaning patch, and residue is probably just carbon from burned powder. Just a suggestion.