I have Bob Brister's book and have read it. However, you'll have to explain how more shot in the pattern at the same relative velocity, equals poorer performance on game birds. It just isn't true. The pattern may not be as "uniform" in its distribution, Which is what Brister focused on, if I remember correctly, but it still has more pellets in it. Also, remember, that I was referring to copper plated (and sometimes buffered) #5 shot. As I remember, Brister's experiments, didn't include that combination.
I should also point out, that when I was younger, (before the lead shot ban for ducks), numerous ducks also fell victim to that same load.
If we applied that same logic re: Brister, to the 12ga., then nobody would be having any success with 3" or 3.5" loads for ducks. I think Duck hunters would disagree.
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