i have been shooting a mossberg 500 12 ga. with the rifled barrel and cantalevered scope mount. it shoots real well but i have been thinking about selling the barrel on ebay and buying a new england ultra slughunter in .20 ga ( single shot break action) i have a nef .270 handi rifle and have a blast (pun intended) shooting it. it would be nice to have a light gun and not have to switch the barrels (i use the mossberg to shoot clays and bird hunt, which overlaps with deer season) all the time. most shots that i have taken with the 12 have been close, so im not too worried about going from 12 to 20. What do you guys think?