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Old January 28, 2018, 06:00 PM   #2
Buzzcook
Senior Member
 
Join Date: November 29, 2007
Location: Everett, WA
Posts: 6,088
Without pictures no one can help you and even experts need more than approximate measurements.
Just so you know 30 gauge or bore is .537".
http://www.hallowellco.com/bore_size_chart.htm
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