Intel6 had some photos of some he made once and finally got around to it myself.
308 brass cut and trimmed to 1.600", expanded at the mouth with a 40 S&W expander, a slightly cut down .410 wad and .53oz of #12 shot.
http://i664.photobucket.com/albums/v...psaufwdamq.jpg
http://i664.photobucket.com/albums/v...psiz72ki2m.jpg
http://i664.photobucket.com/albums/v...ps5glrrhnm.jpg