Number tens would work just fine for marsh hens (rail), but there'd be lots of shot to go through while eating them. By the way, there are several types of railbirds down here. I think the one Miller has in mind is the Sora, which is pretty small; on the other hand, the Clapper, Virginia and King rails get on up to near pheasant size. Surprisingly, they are all very good to eat, having meat midway between 'quail white' and 'dove red'...Geo