Follow the lead recipe for 1 1/4 oz and take account with additional PSI increase like Pete said. I would not shoot the loads you have that have bismuth since the pressures are unknown.
I have used Long Shot with 1 3/8 oz of Nice Shot #2 for ducks and geese and I believe Pete has it in his 10 gauge spreadsheet. I put a 16 ga. felt wad in the shot cup under the shot for better crimps for this load. Devastating load to feather'ed critters....
http://www.randywakeman.com/Nice_Sho...a_10_Gauge.htm