left port or dual port

[pigdog72]

Is there any difrance in how the gun shoots or is the action stiffer with the single port

[RP12]

The left port will be stiffer, less material removed. Whether it makes any practical difference is questionable.

[Stockrex]

Moot point, stiffness is not an issue, dual will be faster to cycle .
This is the response I got when I asked the same question.