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#1 Frame Lifter - First Time Shooting
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04-24-2019, 09:47 AM
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Harry Collins
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Jay,
The bores of these old 12 gauge Parkers were about .751 or 11 gauge to accommodate the wads of 12 gauge extruded brass shells. My calculations indicate a constriction of .0335 of full choke.
Kindest,
Harry