[Researcher]

Originally Posted by J. Scott Hanes

The reason for the shorter-than-published lengths is because of the rib block spacing for attachment to the barrels. A true length rib for actual 26" and 28" would have required a different rib spacing. Better manufacturing efficiency.

That harks back to the 26 3/4-inch Winchester Ventilated Rib barrel on the 12-gauge Model 12 Skeet Gun. 1939 --

Model 12 Skeet Gun 1939 02.jpg

1954 --

Model 12 Skeet Gun January 2, 1954, Winchester Ventilated Rib & Winchester Special Ventilated Ri.jpg

One post back from the 30-inch Winchester Ventilated Rib on the Model 12 Trap Guns.