Have had a 12 gauage Ultra Slug gun for about six years and it
is the most accurate slug gun I have ever owned.Always sighted
it in at 50 yards with 5 shots going in at 1 1/2 inches consistently
using the Barnes Expanders made by Federal.By far the most accurate
slug gun on the market today.Have shot many deer with mine with
most dropping right on the spot.If you get one I would reloctite the
screws on the base that is supplied with gun as mine was not tight
enough so do that before mounting your scope.The 20 gauage would
be a excellent choice.Good Luck with your purchase as they are a
fantastic gun for the price.