Does anyone have any experience with either of these shotguns? I was looking at the 20ga model, since it's 2/3 the cost of the 12ga, and since I already have 2 12ga pumps. What's important to me is the ability to handle a variety of loads reliably and safely, particularly slugs. The Saiga 12 comes with full choke, or smooth barrel for a little more $. Anyone know about the 20? I'd want smooth barrel for slugs.