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Unread 03-15-2017, 11:36 AM   #3
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It has been my experience that the Ithacas I've run a bore mic in have all been over-bored up through the cocking indicator NIDs. I had a 1928 vintage No. 1E 12-gauge with .744" bores. The later NIDs without cocking indicators have been right in the .729", .662", .615" ranges. Maybe over-boring was Uncle Bob's "secret" --

Uncle Bob Edwards.jpg
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