I have shot Nice shot, bismuth and ITX with great results. If you reload then ITX is the most economical soft nontoxic shot on the market. Are you loading BP or smokeless loads ? I have yet to load up nontoxic BP. After a long day of hunting I really don't feel like cleaning barrels.
If you do not reload then: If your barrels are stout and in good condition then you could probably get away with the factory loaded TM (if you can find it) and Bismuth. If you have a light 12 gauge then you may want to purchase some low pressure Nice Shot loads from RST. Republic Metallic Cartridge used to have bismuth black powder shells available. Not sure what they have now.
Good luck with the ducks,
Kurt
