I'm curious about the problem that you encountered with the SG16 wad, because I have found it to be excellent in straight walled hulls.
Claybuster 16 gauge wads have the smallest diameter skirt, which leads to powder migration and bloopers, in cartridges carried around in the field.
It's hard to find a straight willow on the Prairie, when you have a stuck wad, a long way from the vehicle.
There's an easy solution for stuck wads in a situation like that, a "wad knocker". Range shooters carry them all the time. It's just a piece of brass rod about three/four inches long and less than bore diameter. Your drop it down the bore and it "knocks" the stuck wad out the other end. Mine doubles as a handle for a chamber brush.
http://www.comp-n-choke.com/product/TorBrsh.html
