John;
What did the bore diameter measure? Assuming it was .730 that would give you .042 constriction, or a good solid full. What birds do you want to hunt with that size shot? The best and only way to tell how well it patterns with different size shot is to put it on paper on a pattern board. I've found in my Sterlingworths that 7 1/2's pattern very well. Stoned a gobbler at 35yds. last year with the 7 1/2's in my left barrel and it is choked .039.
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