Although it's possible, chances are that an after-market tube will shoot better than your factory full with turkey loads. First of all those turkey tubes are choked quite a bit tighter than the factory tube. The reason that they extend past the muzzle is that the forcing cone is usually more gradual to allow the shot column to adjust to the tighter constriction with less chance of deforming the shot. And the constriction itself has a longer parrallel segment to hold the shot column at a smaller diameter for a while before exiting. Factory tubes are designed for a uniform shot distribution over the whole pattern. This is better for wing shooting.Whereas turkey tubes concentrate the shot in the center of the pattern where it counts.
Like r33, I'm a fan of Undertaker tubes.