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01-09-2024, 08:30 PM

#11

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Pa SxS Research Chairman PGCA Lifetime Member

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Join Date: Nov 2008 Posts: 2,993 Thanks: 1,277 Thanked 5,391 Times in 1,515 Posts

Parker bore diameters for 12 ga. guns up until about S/N 60,000 are over-bored. I'll let Dean display the chart from Austin. My 1882 12ga. hammer gun measures .756. I have yet to measure a Parker 12 ga. that reads the nominal for a 12 ga. at .729. They are all .732 or a few thousands higher. Don't know about other gauges. I have the Stan Baker micrometer set.

The Following User Says Thank You to Chuck Bishop For Your Post:

Garry L Gordon

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