Porting is a fad that has hung on; because it is hard to prove it really doesn't do much.
I have ported a gun, and think MAYBE a 10% reduction in recoil, but don't ask me to prove it. One thing I believe in, is the ones from Browning are just "there;" so buy the gun, and shoot it.
Correct porting does keep the barrels from whipping up, so the second shot is easier.
The sound to someone standing close is very loud. But, again, it isn't a priceless Purdey or Holland & Holland, so buy the darn thing and shoot, shoot, shoot.
Sam Ogle, Lincoln, NE