Question about Porting a barrel

[Ken O]

I've always wondered whether porting a barrel effects the muzzle velocity? They say a longer barrel increases pressure and velocity, so wouldn't porting be equal to having a shorter barrel? Especially when it comes to pistols.
thanks, Ken

[C&Rcollector]

From my experience, yes. My ported 6" 686 is about 75-125 fps slower than my 6" 686 non ported.

['ol shooter]

The biggest issue with porting is the increased muzzle flash and noise. If you are shooting in daylight, the flash isn't as bothersome, at night, blinding.

[LCU1670]

True, its always a good idea to try different defensive rounds and find which one/lot has the lowest flash, ported barrel or not.