You don't say how much shot. It sounds like you want target loads and if so 1oz is more than enough. Myself, I use mostly 3/4 and 7/8 for trap where all the birds are on edge. Many of BPI loads are computer generated. In other words they haven't been tested with a pressure barrel for actual pressures. Alliant also has a web site with many loads. You'll have to go to CBers website, or on their bags for 3/4oz 12ga loads.
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Paul Harm
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