Again in the not quite a Howdah, Ive played with Contender and Encores. While only a single shot, I have to suspect that at least a few singles were pressed into service as Howdah guns. In that spirit, I cut down a 500SW barrel to 9 inches. Its surprisingly not horrible to shoot. I also cut a 50 cal Black Powder barrel down to 9 or 10 inches. Im thinking about having it bored out to 20 gauge smooth bore. Again they arent "traditional" double barrels; but the builds were fun and in the spirit of "I want a Howdah"