I have used 1 oz #6 shot 1170 fps out of open choked 20 gauge fox for years. This is early season over pointing dogs. Think I will try some 7/8 oz #7 shot this year.
I have also used 1 1/8 oz #6 shot in 12 gauge. Hunted with a friend that was using #7 1/2 out of a 12 gauge, seemed to work ok.
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