Dec 26, 2010. Bullet weight is 200 granis (13 grams practical). After the cylinder is removed, its length is measured with a micrometer and the amount of compression is converted to copper units of pressure (c.u.p.) Copper units of pressure - Wikipedia. In more modern pressure guns, the metal disc is replaced by a small quartz crystal. 45-70: Intro to Reloading and Shooting (Marlin 1895 Lever ... Currently, only two copper crushers - 0.146 x 0.400 inch and 0.225 x 0.500 inch - are specified for pressure testing. Cartridges with +P Pressures, list both the standard and +P Pressure. Methods of measuring barrel pressure - Ballistics LUP - Lead Units of Pressure | AcronymAttic Find link is a tool written by Edward Betts.. searching for Copper units of pressure 2 found (12 total) alternate case: copper units of pressure Weatherby Mark V (2,984 words) case mismatch in snippet view article find links to article action has been tested to be able to contain up to 200,000 CUP (Copper Units of Pressure).The testing of the rifle was conducted on a production rifle In Europe, Megapascals (MPa) is common, as well as occasionally bars or atmospheres. What does CUP stand for? - SoeTrust - Soetrust C.U.P. On page 28 you will see it is 35,000 PSI on Piezo transducer pressure gun. Copper Unit of Pressure (CUP) Defined by Hodgdon « Daily ... Cartridge Pressure Standards - kwk Fast 9mm Loads - Shooting Times There isn't. CUP is a special unit of measure defined only for ballistic testing; psi is a standard unit of measure for all pressure testing in the English system. CUP is/was used in firearms cartridge (bullet) pressure statistics by the SAMMI. Kinetic energy at the muzzle is 640 foot pounds. But I think there is a convergence, where the same MA pressure of about 30,000 units is recorded using either method, copper crusher (CUP) or piezo gauge (PSI). 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 gauges respectively. 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. REM Remington CUP Copper Units of Pressure SFT Swift LUP Lead Units of Pressure SIE Sierra PR Primer SPR Speer PSI Pounds per Square Inch WDLGH Woodleigh REF Reformed from parent case WIN Winchester VEL Velocity BULLETS AB Accu-Bond JFP Jacketed Flat Point SP Spire Point, Soft Point A-MAX Hornady Match JHC Jacketed Hollow Cavity SPBT Soft Point . Up until that time, what we now call CUP was commonly known by two different names: CUP and PSI. Think before you climb Is it acronym or abbreviation? but is 65,000 PSI. . Bullet Ballistics 101: Pressure, Velocity Distance The difference in crusher length before and after firing is then converted mathematically to a pressure range, in units of CUP or LUP (copper units of pressure or lead units of pressure) Copper crushers are generally either 146 in diameter and 400 long to start with, or 225 in diameter and 500 long Choice depends on application Copper crushers . Lead units of pressure is supposed to approximate PSI, and so is CUP, copper units of pressure where the pellet is made of copper instead of lead, used . 04-21-2021, 01:39 PM. The process is such that there is no conversion from one to the other. The .454 Casull is one of the top three or four most powerful commercially produced handgun rounds. Of course, this use of PSI was incorrect. 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. Small carefully controlled cylinders of soft metal, copper, called "crushers" are placed in a tool attached to the chamber area of a rifle barrel where a hole has been bored . 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. 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. It was then measured and compared to a chart to come up with the pressure. Cartridges with +P Pressures, list both the standard and +P Pressure. Originally, a precisely formed copper slug was placed in a fixture over the chamber. It wasn't much of a As Ed Harris explains, once the compressive strength yield point of the copper is reached, the rate of deformation is no longer uniform. That power alone could throw wood or metal fragments hundreds of times further than the few inches these weapons are from the user's face and body when being fired. Shooters should note, however, that a given round's "Copper Unit of Pressure" (CUP), which is different than published chamber PSI, can have adverse influence on the function of a particular gun. (copper units of pressure). Example: the faster a charge reaches 30,000 psi, the more shock it carries. In Lyman's testing they limited pressure to 15,000 CUP and to reach that required lots of powder, like 160 grains of 3f under a .50 caliber ball and that is no where near to bursting a good barrel. Gamers!!! GMD: GEL: GHS: GIP: GBP: XCD: QTQ: GGP: GNF: GWP: GYD: HTG: HNL: HKD: HUF: There is no true relationship between the readings. Before about the 1960's the only measurement system we had for chamber pressure was the copper crusher method. 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 gauges respectively. (a) Uses an action mechanism which is substantially identical in design to any action mechanism manufactured in or before 1898 that was originally chambered for rimfire ammunition developing maximum safe permissible breech pressures below 19,000 copper units of pressure as standardized by the Sporting Arms and Ammunition Manufacturers Institute; For example, 7.62mm NATO ammunition that has been subjected to 125°F to -65°F storage conditions can have an average pressure that shall not exceed 55,000 CUP . PSI (pound/force-square inch), CUP (copper unit pressure) and neither measurement in the Lyman 50th Manual (2016) Paging thru the previously mentioned manual there is a mixture of CUP or PSI reference measurement in regards to pressure and certain cartridges no pressure measurement listed. Categories Most relevant lists of abbreviations for CUP - Copper Units of Pressure 2 Gun 2 Shooting Sport 1 Pressure 1 Copper 1 Crusher 1 Rifle 1 Military 1 Technology 1 Shooting Alternative Meanings CUP - Cancer of Unknown Primary CUP - Conditional Use Permit The trim to length is equivalent to the minimum case length. The Copper Units of Pressure (CUP) table organizes the data for referencing the measured length of a fired crusher. of chamber pressure. This is taken straight from the publication ANSI/SAAMI Z299.3-1993, pages 12 and 16. 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. LUPs were generally used for shotguns, and other very low pressure applications that couldn't be accurately measured by the CUP method. 1.125" Starting Load Grains 8.5 Velocity (ft/s) 1,241 Pressure 25,100 PSI Maximum Load Grains 11.5 Velocity (ft/s) 1,434 Pressure 31,900 A copper crusher barrel held a small disc of copper that would be crushed when the round was fired. Pressure generated by the burning propellant causes the piston to move and compress the copper cylinder. Some cartridges do not have either a PSI or CUP listed, and these values are omitted. A CUP value may coincide with a PSI value; for example, SAAMI lists 28,000 as maximum average pressure for the .45-70. cup (copper unit of pressure) Back to home A pressure value determined by means of copper crusher cylinders using SAAMI recommended procedures and equipment. There is a photo circulated of an Indian made Brown Bess with a . There's also another measure, LUP, or Lead Units of Pressure, which was the standard way of testing low-pressure rounds like shot shells. The commercial ammunition usually conforms to the SAAMI standards using the (piezoelectric transducer system) AND/OR the (Copper Units of Pressure, CUP) pressure measurement systems. This actually measured pressure. Pressure Pressure: The force exerted by burning powder measured in Copper Units of Pressure (CUP) or Pounds per Square Inch (PSI). Some cartridges do not have either a PSI or CUP listed, and they are omitted. 135 GR. As Ed Harris explains, once the compressive strength yield point of the copper is reached, the rate of deformation is no longer uniform. Infinite suggestions of high quality videos and topics As a result of this, the results are referred to as ' lead or copper units of pressure' . A: Copper Unit of Pressure (CUP) is a measurement used in the ammunition industry to determine the chamber pressure created by a cartridge load. Pressure Converter. This cartridge relies on a big bullet at modest velocity to take game. Case in point, I was looking for a high performing .357 Magnum round for a new Smith 386-Plus revolver. Spelling: American | British. The most important number manufacturers adhere to when loading ammunition is the Maximum Average Pressure (MAP). . 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. The measurements produced this way are expressed in Copper Units of Pressure, or CUP. To this day, most published chamber pressure (MAP) data for metallic cartridges is taken by the copper crusher method of measurement. Through this method, measuring the difference in the pressure of 5.56 and 223 made it easy to conclude that the 5.56 has a much higher PSI than the 223. Like this? 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 fixture over the chamber When the cartridge was fired, the amount of crushing measured on . It is important to realize "12,000" higher # should get your attention. While with #5 it's only 1263 at 36,000. This is the thinest portion of a . The copper crusher system----CUP, or Copper Units of Pressure----measures peak pressure only, an the tools used must be calibrated. As a rule this level of load is pleasant to shoot, and is also surprisingly effective on game. Copper Units of Pressure, "CUP" as well as "LUP", Lead Units of Pressure" are very old and out dated specifications, that are no longer used in the firearms industry. The proper name for this type of measurement is CUP, or Copper Units of Pressure. -- Naaman Brown 14:32, 5 July 2018 (UTC) Pressure measurements made with copper or lead crushers are in COPPER UNITS OF PRESSURE = CUP, (infrequently LEAD UNITS OF PRESSURE = LUP) Pressure measurements made with strain gauges are in pounds per square inch = psi (or sometimes, across the water, in those baffling metric things). Copper Units Pressure: Physics Related: CUP: Common User Products (or Processor) Military and Defence: CUP: CUP - Frequently Asked Questions. On page 20 of SAAMI Specs the pressure is listed in CUP's is 45,000 on a copper crusher pressure gun. However the pressure was not related to a base (i.e. Because the indicated pressure from crushers is known to be off, SAAMI many decades ago began referring to the indicated pressure from their tests as "Copper Units of Pressure," a clumsy name commonly shortened to "CUP." For low pressure cartridges such as shotshells, lead is used for the crusher, and SAAMI refers to these numbers as "LUP." Don't know how many of you got this message from the CMP. The SAAMI Maximum Average Pressure (MAP) is listed in both the Copper Units of Pressure (CUP) and the Pounds per Square Inch (PSI). Copper units of pressure Wikipedia. It's design pressure was 35,700 CUP and remained so until the American Institute called SAAMI reduced it as well as the pressure measuring system in the late 80s to 35,000 PSI which equals 33,000 CUP, Copper Units of Pressure. This is the highest average pressure allowed in a group of test ammunition during a production . I've heard persons claim "pressure is pressure." Do the conversion factor on, lets say 4 of you favorite calibers and see if the conversion is correct. CAT7 Bare Copper Solid SSTP/SFTP (Screened Foiled Twisted Pair) Meets Or Exceeds Category 7 Performance In Compliance With TIA/EIA 568-C. 2; UL Listed for In-Wall and Riser Installation (CMR) ISO/IEC 11801 Verified, RoHS Compliant; Supports up to 600MHz and Suitable for 1000BASE-T / 1000BASE-TX (Gigabit Ethernet) and 10GBASE-T (10-Gigabit Ethernet) Just that Lyman using the same unit of pressure in it's book is loading the .40 25% lower then 9mm where others load 9mm and .40 to about the same pressure limit no mater what pressure limit they . The pascal (symbol: Pa) is the SI derived unit of pressure used to quantify internal pressure, stress, Young's modulus, and ultimate tensile strength.The unit, named after Blaise Pascal, is defined as one newton per square metre and is equivalent to 10 barye (Ba) in the CGS system. CUP is the Copper Crush method to establish chamber pressure measurements are taken in a special test barrel with a .200" hole drilled through to the cartridge portion of chamber in the test barrel. Copper units of pressure Wikipedia OverviewMethodologyComparing unitsCUP and LUP pressures vs. transducer pressuresExternal links. Breach pressures reach 60,000 CUO (copper units of pressure), meaning when you touch off one of these bad boys you will experience some serious recoil..480 Ruger This Ruger New Model Super Blackhawk Bisley is chambered for the .480 Ruger Hell-Boy. What does CUP stand for? The trim to length is equivalent to the minimum case length. Use this pressure converter to convert instantly between bars, gigapascals, kilopascals, millibars, newtons per square meter, pounds per square inch and other metric and imperial pressure units. 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