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copper crusher pressure

Apr 18 2015 · A Copper Unit of Pressure CUP is a measurement used in the ammunition industry to determine the chamber pressure created by a cartridge load Originally a precisely formed copper slug was placed in a fixture over the chamber When the cartridge was fired the amount of crushing measured on the slug allowed engineers to determine the pressure

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  • Metallic Cartridge Chamber Pressure Measurement

    Another similar method uses lead crusher pellets and the resulting pressure values are called Lead Units of Pressure or LUP Lead is more easily deformed than copper and the LUP method is normally used for measuring relatively low chamber pressures such as those generated by shotgun shells while copper crushers CUP are used for measuring the pressure of handgun and rifle cartridges

  • WEAPON CHAMBER PRESSURE MEASUREMENT

    copper sphere deflection and pressure level that is presented in copper crusher gage tarage tables For each type of transducer U samples were placed in the oorts of the hydrodynamic generator Ten shots were fired at a pressure level of approximately 379 MPa 55000 PSI The static test for

  • CUP psi amp Reloading Data Shooting Times

    A copper crusher is placed on the upper end of the piston Crushers are made to high material and dimensional standards and each lot is calibrated to ensure consistent deformation To provide the resistance that ensures the crush and captures the crusher the pressure barrel has a heavy yokebasically an inverted U

  • What Affects Rifle Chamber Pressure and Critical Factors You

    A small copper cylinder of predetermined compressibility is placed into a yoke device that is clamped to the barrel in its chamber area where pressure is highest One end of a piston is positioned through a hole drilled through the wall of the barrel

  • BALLISTIC PRESSURE SENSOR REFERENCE GUIDE

    The gas check piston and copper crusher are installed and retained with the thumb screw When fired the gases vent out through the drilled hole and expand the gas check into the piston hole forming a seal The resulting pressure acting on the piston forces the copper crusher into a permanent deformation The crusher is removed and carefully

  • CUP psi amp Reloading Data Shooting Times

    Pressure against the piston shortens the crusher We measure the crusher and consult a table of pressure values provided with each crusher lot Starting at 0499 inch the table lists decreasing lengths in thousandths of an inch and beside each length the pressure in copper units of pressure CUP that it takes to shorten that much

  • measuring base pressure using copper crushers

    to crusher gauges for measuring peak pressure a copper pellet crusher using a the base of the cartridge case the steelcopper holder Inquiry source Pressure in Revolvers By Bill Caldwell Rifle Magazine although a plain base we use 146 x 400 copper crushers for pressures up to crusher system of pressure measurement

  • WEAPON CHAMBER PRESSURE MEASUREMENT

    copper sphere deflection and pressure level that is presented in copper crusher gage tarage tables For each type of transducer U samples were placed in the oorts of the hydrodynamic generator Ten shots were fired at a pressure level of approximately 379 MPa 55000 PSI The static test for

  • What Affects Rifle Chamber Pressure and Critical Factors

    Maximum recommended pressure for a rifle cartridge is usually dictated by the action strength of the rifle for which it is developed For many years the copper crusher method was used throughout the shooting industry for determining chamber pressure and you can see some of the equipment required in the lead photograph accompanying this article

  • Experimental techniques for ballistic pressure

    Kistler pressure transducer and the copper crushers All measurements were taken at 21 ±2°C in a completely enclosed shooting test stand free from weather influences Results of this series have been used in the second part of this paper to study the dynamic behavior of copper crusher gauges 23 Results and discussion 231

  • Rimfire FiringPin Indent Copper Crusher part 2 2017

    Apr 03 2017 · Rimfire FiringPin Indent Copper Crusher part 2 The RFPI crusher was made of the same material specified in the SAAMI technical manual for the cylindrical pressure measurement used by ballistic test laboratories to measure the chamber pressure generated when a cartridge is fired and served as the firingpin indent crusher used for testing

  • BALLISTIC PRESSURE SENSOR REFERENCE GUIDE

    The gas check piston and copper crusher are installed and retained with the thumb screw When fired the gases vent out through the drilled hole and expand the gas check into the piston hole forming a seal The resulting pressure acting on the piston forces the copper crusher into a permanent deformation The crusher is removed and carefully

  • Dynamic Calibration Of Chamber Pressure Transducers

    Background Timeline • Circa 1860 use of copper crusher gages began static calibration used • Circa 1920 use of electronic chamber pressure transducers began • Circa 1960 dynamic calibration of crusher gages began 25 improvement • 1990 NATO crusher trials imply 1 difference between US Tourmaline and French Quartz measurements Everyone celebrates excellent

  • Internal Ballistics Fr Frogs Pad

    CUP Copper Units of Pressure In this pressure measuring technique a hole is drilled in the chamber and a piston fitted that presses on a calibrated copper slug or crusher Some set ups also drill the cartridge case which changes the results compared to nondrilled cases The whole assembly is held in place with a yoke

  • SAAMI Pressure Chart Page 2 Shooters Forum

    Mar 14 2011 · Its an article with some history the first Piezo gun pressure measuring device was made in 1922 the copper crusher was invented in 1860 and it presents data on a copper crusher vs a nonconformal type Piezo transducer gas sampling that is coinstalled on the same 3006 barrel The tests are done by HP White Laboratories

  • Correlating PSI and CUP

    of chamber pressure Before about the 1960s the only measurement system we had for chamber pressure was the copper crusher method Up until that time what we now call CUP was commonly known by two different names CUP and PSI The two were used practically interchangeably Of course this use of PSI was incorrect It wasnt much of a

  • Copper Crusher Gauge Crusher Mills Cone Crusher Jaw

    The copper crusher A typical pressuretime conformal pressure measurement for 12 gauge shot shell ammunition is illustrated in Figure 5 50000 cup is 50000 PSI obtained with the copper crusher gauge 50000 lup is 50000 PSI read with the lead crusher gauge

  • Nonlinear Material Behavior Analysis under High

    Gun chamber pressure is an important parameter in proofing of ammunition to ensure safety and reliability It can be measured using copper crushers or piezoelectric sensor Pressure calculations in copper crusher method are based on linear plastic deformation of copper after firing However crusher pressure deformation at high pressures deviates from the corresponding values measured by

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