I'll agree with NiklasP above. One of my very favorites is a Max Fischer 16 bore hammer gun made in Berlin (it appears to be a Sauer barreled action finished up by the well known Fischer and marked with his name) that is a very trim round action, weighs in at just under 6 pounds, and is a delight on upland birds of all kinds. It's very quick handleing. It dates to about the turn of the century. (1900) I also agree that sling swivels are very desirable for a hunting double. Another heavier hammer gun I enjoy is a stout Griefelt 12 gauge gun with very thick breech walls, and .060 chokes in both tubes. It's an excellent high dove gun. The early German guns are hard to beat, IMO.