WebMar 10, 2024 · Demystifying the methods and terminology of ammunition pressure testing. To measure pressure, the copper-crusher method uses a test barrel, gas check, piston … A chamber pressure measured with a copper crusher gauge would there be expressed in psi (CUP) in the British Imperial system and United States Customary system, bar (CUP) in the metric system, and MPa (CUP) in the SI system. See more Copper units of pressure or CUP, and the related lead units of pressure or LUP, are terms applied to pressure measurements used in the field of internal ballistics for the estimation of chamber pressures in firearms. … See more While CUP and LUP numbers were intended to be comparable to the crushing power of a given pressure in psi (lbf/in ), the numbers are not equivalent. Since a longer duration, … See more • Chamber Pressure Measurement by Terry Hart • Chart of SAAMI pressure levels for common cartridges, in PSI or CUP. • A study done that shows a statistically significant correlation between CUP and PSI for rifle cartridges. See more Estimation of pressure using CUP and LUP units is performed by a special crusher gun, which uses pressure applied to a piston to crush a carefully manufactured and calibrated copper or lead cylinder. The amount of deformation is compared to the … See more Until the invention of measurement transducers in the 1960s, crusher guns were the only reliable method for estimating chamber pressures. With the availability of inexpensive, reliable transducers since the 1960s for actually making chamber … See more

Copper Crusher Gauge Holder: Eugene W. Bowie: Amazon.com: …

WebFeb 3, 2024 · A single copper indent crusher is placed in the firing chamber of a firearm and the trigger is pulled, causing the firing pin to strike and leave an indent mark on the rim area of the copper crusher. The … st pats church oneida ny

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WebA chamber pressure measured with a copper crusher gauge would there be expressed as psi (CUP) in the English system, bar (CUP) in the metric system, and MPa (CUP) in the SI system. Note: The above text is excerpted from the Wikipedia article Copper units of pressure, which has been released under the GNU Free Documentation License. WebUntil the mid 1960's the only method commonly used for measuring chamber pressures was the copper crusher. Basically, a hole is drilled in the chamber of a firearm and a crusher chamber is attached to that hole. In this crusher chamber is placed a very precisely manufactured piece of copper. ... This third method is called the Strain Gauge ... Webcylinderholderuntilitisheldinthemiddleofitslength.Seize theendofthepressurecylinderwiththehandpliersandplaceit inthegaugerestingonthepistonheadandsupportedaxiallyby ... rothacher polybau ag