Clapper,
I take it that you are referring to Carlo Rizzini who preaches delivery of 16 to 18 grams with full and full chokes.
Obviously it works for him, but for us lesser mortals I suspect that if we are keeping ranges down to 30 yards or less we will be better off with more open chokes which can still deliver sufficient but more even pattern density with small shot at the range.
W.D.M. Bell impressed onlookers with the height at which he was consistently bringing down Cormorants flighting off the top of a high African waterfall.
When they asked about his gun, he explained that he was just burning off unreliable solids in his 6.5mm Mannlicher Schoenauer
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