Harold when I went to 7/8 oz from 1 oz I didn't change anything but the amount of shot. The powder I'm using in the 16 is no longer being produced so data won't help but just increase your shot charge and you should be fine.
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There is no hunting like the hunting of man, and those who have hunted armed men long enough and liked it, never care for anything else thereafter...Earnest Hemingway
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