Dan go to the Hodgdon Powder site, http://data.hodgdon.com/shotshell_load.asp There are enough loads there to keep you busy for a while. This one here is for using 1 oz. shot, but there are plenty for 1 1/8 oz also.
Lead Shot 12 1 1 oz. Clays Rem. 209P WAA12SL 16.2 6,500 PSI 1125