I've got porting on my competition gun. I haven't noticed a distinct difference in recoil compare to guns without the porting. What I have distinctly noticed is that cleaning a ported barrel is much more difficult with a ported barrel. I find myself with q-tips and pipe cleaners trying to get into every little hole...and even then I end up with a couple residue flakes I can never seem to get off.
Like many things (e.g. raised ribs on skeet guns), I think there's solid science and engineering behind porting...but I personally don't find the benefit in recoil reduction to justify the additional hassle in cleaning.
I would not disqualify a gun for purchase if it had ported barrels, but it is most certainly not a requirement for me, and I prefer the regular barrels.
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