I personally bought the 12 gauge USH and absolutely love it. In my opinion the kick is not that bad, however, I read an article that talked all about 12 vs 20 gauge slug guns. They did studies and actually found that a 20 gauge slug will have same if not more power at 200 yards. They both work fine and like I said, I own the 12 gauge. Personally, they are both accurate and powerful so either way you will be happy. The only advantage with the 20 gauge is that it could be lighter than the by a few pounds. Beyond that, they are both great and can't go wrong.