Hastings used to make shotgun barrells with grooves cut in them, like rifleing without the twist, claiming shot column stableizing from the grooves helped with pattern and range. I have come to believe that those claims must have been false, as no manufacturer sells shot guns with grooved barrels, that I am aware of. But the theory, to me, seems sound. Anyone tryed or used a barrel like this? And, if so, was better patterning acheived?