Correlating PSI and CUP

of chamber pressure. Before about the 1960's 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 wasn't much of a

Copper Unit of Pressure (CUP) Defined by Hodgdon

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 …

Talk:Copper units of pressure - Wikipedia

In reference to copper or lead unit of pressure (CUP or LUP) "cylinder" refers to the cylinder of copper or lead crushed by the piston in the chamber of the test barrel. The amount of crush in these cylinders is then measured to determine the amount of pressure generated by firing the cartridge. -- Naaman Brown ( talk) 14:32, 5 July 2018 (UTC ...

Copper Units « Daily Bulletin - AccurateShooter.com

CUP Pressure Measurement The CUP system uses a copper crush cylinder which is compressed by a piston fitted to a piston hole into the chamber of the test barrel. Pressure generated by the burning propellant causes the piston to move and compress the copper cylinder. This will give it a specific measurable size that can be compared to a set ...

Pressure Converter

Free online pressure converter - converts between 53 units of pressure, including pascal [Pa], kilopascal [kPa], bar, psi [psi], etc. Also, explore many other unit converters or learn more about pressure unit conversions.

Copper Tube For ACR - Air Conditioning Systems

Copper tube is used for refrigerant piping between components of air conditioning systems and must be properly sized. ... If you need a higher pressure tube, thicker type is to be used to ensure it can handle the pressure of the refrigerant. Type L outer diameters typically starts from 3/8 inch followed by 1/2 inch, 5/8 inch, 3/4 inch, 7/8 inch ...

Know Your Terminology — CUP vs. PSI « Daily Bulletin

The Pounds per Square Inch (PSI) and the older Copper Units of Pressure (CUP) version can both be found in the PDF pamphlet. The CUP system uses a copper crush cylinder which is compressed by a piston fitted to a piston hole into the chamber of the test barrel. Pressure generated by the burning propellant causes the piston to move and compress ...

Copper units of pressure - Wikipedia

Copper units of pressure - Wikipedia

What the heck is C.U. P. pressure | Ruger Forum

It stands for "Copper Units of Pressure" and is a method of estimating pressures inside the chamber of a firearm based on how much that pressure deforms a copper cylinder in comparison to deformations of other, identical cylinders under known pressures. For example, if a force of 5 psi squishes a copper cylinder 10% in tests, then you fire a ...

Small arms ammunition pressure testing - Wikipedia

Small arms ammunition pressure testing is used to establish standards for maximum average peak pressures of chamberings, as well as determining the safety of particular loads for the purposes of new load development.In metallic cartridges, peak pressure can vary based on propellant used, primers used, charge weight, projectile type, projectile seating depth, neck …

LOAD DATA FOR ACCURATE TCM

CUP Copper Units of Pressure SAAMI Sporting Arms and Ammunition Manufacturers' Institute C Compressed Powder Charge. 4 2 I .WESTERNPOWDERS.COM • Cartridge Overall Length (COL) is an important measurement that sets both bullet protrusion into …

Copper units of pressure – Wikipédia, a enciclopédia livre

O termo copper units of pressure ou CUP, e o relacionado lead units of pressure ou LUP são aplicados a medições de pressão usadas no campo da balística interna para a estimativa das pressões da câmara em armas de fogo. [1]Utilização. Os termos "CUP" e "LUP" foram adotados por convenção para indicar que os valores de pressão foram medidos pelos instrumentos de …

Rimfire Firing-Pin Indent Copper Crusher

Currently, only two copper crushers – 0.146 x 0.400 inch and 0.225 x 0.500 inch – are specified for pressure testing. The difference in crusher-bar length before and after firing is measured and then converted mathematically to a pressure, in units of CUP (copper units of pressure). It is important to realize

CUP, psi & 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 0.499 inch, the table lists decreasing lengths in thouhs of an inch and, beside each length, the pressure in copper units of pressure (CUP) that it takes to shorten that much.

Copper Units of Pressure - benchrest.com

CUP is only a mechanical means to measure maximum pressure. This is an old school method. Now with the advent of transducers we can get real time pressure curves to be able to calculate where the bullet may be in it's progress …

Physics:Copper units of pressure - HandWiki

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 …

Copper units of pressure | Military Wiki | Fandom

Technical Information. SAAMI Standards. Equipment Suppliers. Cartridge & Chamber Drawings. New Cartridge & Chamber Drawings. Reference & Proof Ammunition. Recoil Formulae. …

Ballistics 101: What is pressure? - Police1

The pressure of firearms ammunition can be measured in several units: Most commonly used in the United States is pounds per square inch (PSI), but the older copper units of pressure (CUP) is still in use as well. In Europe, Megapascals (MPa) is common, as well as occasionally bars or atmospheres. Importantly, the way that pressure standards are ...

60 - Ramshot

CUP Copper Units of Pressure SAAMI Sporting Arms and Ammunition Manufacturers' Institute C Compressed Powder Charge. 4 60 • Cartridge Overall Length (COL) is an important measurement that sets both bullet protrusion into the chamber and usable space within a …

LUP to PSI | Shotgun Forum

Lead and copper units are both inaccurate compared to radial transducer (C.I.P) pressure readings. It becomes more clear when looking at cartridges that have been rated both by ANSI CUP and ANSI PSI ratings. CUP for the .22-250 Remington is 53,000 cup . . . but is 65,000 PSI. "12,000" higher # should get your attention.

Ammunition Pressure Testing - Guns and Ammo

To measure pressure, the copper-crusher method uses a test barrel, gas check, piston and copper crusher cylinder. Above, right, is a close-up of an assembled gas check, piston and copper crusher. March 10, 2022 By Dave Emary. Most commercial ammunition manufacturers have standards used for loading ammunition that include testing and …

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supplier with each lot of crushers to estimate the peak pressure. The value of maximum pressure is expressed in Copper Units of Pressure (CUP) or Lead Units of Pressure (LUP). Major drawbacks of this technique are that it has a limited accuracy and gives only the chamber peak pressure value.

CUP>

Pressure measurements made with copper or lead crushers are in COPPER UNITS OF PRESSURE = CUP, (infrequently LEAD UNITS OF PRESSURE = LUP) ... SAAMI sets voluntary pressure standards for manufacturers, (see the link on the cite); and manufacturers are instructed to use a random sample size of 10 cartridges from a lot to measure pressure. …

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Ballistic Pressure Sensors Reference Guide - Snipers Hide

resulting pressure acting on the piston forces the copper crusher into a permanent deformation. The crusher is removed and carefully measured. Tables supplied by the crusher manufacturers are used to convert the deformation into a relative value, called copper units of pressure (commonly referred to as "cups.")

Copper units of pressure - Nanowerk

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. These terms were adopted by convention to indicate that the pressure values were measured by copper crusher and lead crusher ...

Copper units of pressure - Infogalactic: the planetary knowledge …

Since a longer duration, lower pressure pulse can crush the cylinder as much as a shorter duration, higher pressure pulse, CUP and LUP pressures frequently register lower than actual peak pressures (as measured by a transducer) by up to 20%. For example, the SAAMI maximum pressure for the 7.62×51mm is given as 52000 psi (CUP), or 62000 psi ...

Copper Units of Pressure (Norman Johnson) - yarchive.net

From: Norman Johnson Newsgroups: rec.guns Subject: re: Can someone provide a definition for a "Copper Unit of Date: 3 Sep 1999 22:49:50 -0400 #Can someone provide a definition for a "Copper Unit of Pressure"? #I've been trying to find out exactly what this is, in terms of PSI of #Pascals, and can't find anything.

Copper units of pressure - owly.wiki

For example, the SAAMI maximum pressure for the 7.62×51mm is given as 52,000 psi (CUP), or 62,000 psi (430 MPa ); the .45-70, on the other extreme, is listed as 28,000 in both CUP and …

Cup « Daily Bulletin - AccurateShooter.com

The Pounds per Square Inch (PSI) and the older Copper Units of Pressure (CUP) version can both be found in the PDF pamphlet. Image by ModernArms, Creative Common License. CUP Pressure Measurement The CUP system uses a copper crush cylinder which is compressed by a piston fitted to a piston hole into the chamber of the test barrel.

Pressure signals - by Ric Tester - SSAA

This may be presented as either a value in 'copper units of pressure' (c.u.p) or pounds per square inch (psi), depending upon how the measurement was obtained. The former value (also the oldest) is established by placing the cartridge in a special barrel that has been fitted with a piston located directly above the combustion chamber ...

CUP vs. PSI — What's The Difference in Pressure …

The Pounds per Square Inch (PSI) and the older Copper Units of Pressure (CUP) version can both be found in the PDF pamphlet. Image by ModernArms, Creative Common License. CUP Pressure Measurement The …

Rimfire Firing-Pin Indent Copper Crusher (part 1) | ...

A uniquely configured copper-crusher system serves this purpose. The copper crusher measures firing-pin load pressure using a solid bar machined of high-purity copper, from which the mini copper bars are sliced and machined to the exact size and shape of the many rimfire cartridge designs (e.g., short, long rifle, magnum).