The L.C. Smith Collectors Association
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CIP service pressures

Edited by board administrator May 20, 2023, 4:12 pm

 It is important to recognize that shells loaded to CIP standards (English, Italian, etc.) have two service and proof pressures: “Standard Proof” lead or steel, limited to no larger than 3.25 mm / U.S. No. 4 and max. fps 1,300. Maximum Average (Service) Pressure 740 BAR = 10,733 psi; Maximum Statistical Individual Pressure 850 BAR = 12,328 psi; Mean PROOF Pressure 930 BAR = 13,489 psi “High performance/Superior Proof” Maximum Average (Service) Pressure 1050 BAR = 15,229 psi; Maximum statistical individual pressure 1200 BAR = 17,405 psi; Magnum proof 1320 BAR = 19,145 psi If the shells are "Superior Proof" the box will be so marked. Smith guns were not designed for service pressures of > 15,000 psi
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 Responses Re: CIP service pressures - Marvin Susott May 22, 2023, 9:04 am « Back to index | View thread »

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