Thread: 1883 stepped 2 5/8 chamber
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Chamber Dimensions
Unread 12-20-2011, 09:05 AM   #2
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Austin W Hogan
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Default Chamber Dimensions
A 12 ga shell is .810 outer diameter; the paper is .030 (1/32) inch thick. The ID of the shell is .750 ; a perfect match for a .750 bore. Was this Parker's intention? or was it easy to obtain 3/4 reamers ? The tooling changed around s/n 70000.

Does anyone know when chamber taper originated?

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