Late to this discussion (eating a bushel of oysters took a few days)
Does porting help in muzzle jump? I'd say a little. Does it help in recoil? (This is where Zippy/Big Jim and I disagree - I say no.
Does it increase muzzle blast to your ears and those on either side of you? Absolutely.
The top tier sporting guns - Perazzi, Kreighoff, Blazer, Beretta, Fabbri and nauseum typically do not offer it as standard. There must be a reason........
That said, if a gun I want has it, I'll deal with it. Would I spend extra $$$ to have it done, either from the factory or from the likes of Magnaport or Briley? Not a chance
Come and get me Zippy!.......
