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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?
Best, Austin
The Following 2 Users Say Thank You to Austin W Hogan For Your Post:
Chamber Dimensions
Threaded Mode