I found this load on the Alliant site, please double check it to make sure I've got it right.

20 gauge Federal plastic hull
7/8 ounce of shot
CCI 209M primer
17.5 grains of Herco powder
20s1 Federal wad
pressure 7,600 psi
velocity 1200 fps
I think that is about as low as you can go.
Pete

Last edited by sxsman1; 03/19/16 06:09 PM.