Be aware that many 28 gauge guns are based on 20 gauge receivers, and the 28 gauge is actually a few ounces heavier. Some O/U and SxS guns do however have actual 28 gauge frames, and are a few ounces lighter than a 20 gauge. There is a lot more availability of 20 gauge ammunition as well, which may be a consideration. I buy 28 gauge hunting loads by the flat, and load my 28 gauge target loads, so cost and availability, is not really a factor for me. I have cut my shotguns down to two SxS upland guns, two O/U clays guns, and two semi auto waterfowl guns, but I have owned several more at times.