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Cartridge Pressure

Discussion in 'Uncategorized Threads' started by timb99, Mar 15, 2007.

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  1. timb99

    timb99 Well-Known Member

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    Does not exist.

    There is no meaningful conversion factor.
     
  2. BDodd

    BDodd TS Member

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    To ensure you're convinced, Timb99's dead right....breakemall....Bob Dodd
     
  3. waverider

    waverider Well-Known Member

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    There is one in either Lyman's 4th edition shotgun reloading manual. Problem is that there are only 3 pressures listed.

    Use 1,000 added the LUP to get an estimated PSI. I am not sure of the plus or minus difference from the 3 pressures listed.

    Jason
     
  4. TOOT

    TOOT TS Member

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    From Hodgdons website:

    Q. Can I convert LUP (or CUP) to PSI?

    A. There is no mathematics formula for the conversion of LUP/CUP to PSI or visa versa. PSI is directly measured by a conformal piezo electric force transducer. This allows for a direct reading of the pressure. LUP/CUP depend on piercing the case and allowing the generated gas to compress a crusher. The deformation of the crusher determines the LUP/CUP value. This is an indirect method of measurement that is less accurate at both the high end of the pressure range and the low end of the pressure range. Both PSI and LUP/CUP are accepted methods of measuring pressure in cartridges. All Hodgdon data conforms to SAAMI specifications unless noted otherwise in the data.
     
  5. Harold

    Harold TS Member

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    The data listed in LUP is older data, but still useful. Newer data is developed in psi. What's to wonder about?
     
  6. oletymer

    oletymer Member

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    They did not list a conversion. The examples shown were tested both ways.
     
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