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I have said this before , How does a chronograph tell pressure ? It doesnt . It tells velocity . Just because the book says that with x velocity the pressure is y ,That is for there test barrel with internal dimensions from one end to the other that are different from yours . Do you match the componenets of the loads exactly ? different Powder lots also change the burn rate , different burn rate is a different pressure curve .
Gun barrels are proofed at well above Saami specs but I have found that most of my guns shoot there best below max loads.
Is there a flaw in my thinking ?
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