The 16 Ga "syndrome" seems to have gone almost everywhere, squized between the 12 and 20 Ga, it fell victim of the industrial gun makers that wanted fewer frames and models to produce. On top, the O/U came in droves in the 70's and 80's, glutting every market. Here the second hand market has been constantly offering a good supply of 16 Ga sidebysides, some of them, taking refugee in my stable (Darne, Win21, Ideal, J. Winkler) and going periodically for doves, pigeons, quail and perdiz. Still it is here the preferred calibre of the small farmer/peasant. Thanks to the writtings of Gene Hill, Richard Grozik and Michael MacIntosh, the 16 Ga sxs virtues have been reconsidered by the North American upland shooter.