What size bismuth shot to purchase for ducks...

[Keith Doty]

Ken, I just had some tested at Precision, 16 ga. and 12 ga. hand load bismuth.
12 ga.
20 gr. Int'l 1 oz. #5 bismuth Cheditte 2 1/2" Cheditte 209 comp spcl short wad
avg 1265 fps avg 7692 psi
Just a bit faster than I anticipated but happy pressures. I may back off 1 gr.
16 ga.
15.7 gr. Int'l 7/8 oz. bismuth Cheditte 2 1/2" Cheditte 209 sporting 16 wad
avg 1229 fps avg 8733 psi
Same 16 ga. load w/Fioche 616 and lead #7 Avg 1211 fps avg 8433 psi
Shooting in Parkers with steel barrels.

[10 bore]

Here in nh we shoot a lot of wood ducks and for the most of my shooting is 7/8 th oz bismuth 6 s out of a 20 ga, so out of a 12 ga 6 s or 5 s should work just fine.
Scott