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bonanza
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Reged: 17/05/04
Posts: 2335
Loc: South Carolina
PSI vs CUP
      #85787 - 17/09/07 06:30 AM

Interesting reading for the mathematically inclined.

http://www.shootingsoftware.com/ftp/psicuparticle2.pdf

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CptCurlAdministrator
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Reged: 01/05/04
Posts: 5284
Loc: Fincastle, Botetourt County, V...
Re: PSI vs CUP [Re: bonanza]
      #85811 - 17/09/07 09:12 PM

Interesting. Thanks for posting this link.

Curl

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RoscoeStephenson.com

YOUR DOUBLE RIFLE IS YOUR BEST FRIEND.



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DarylS
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Reged: 10/08/05
Posts: 26998
Loc: Beautiful British Columbia, Ca...
Re: PSI vs CUP [Re: bonanza]
      #85820 - 18/09/07 12:36 AM

Yes - that was interesting. Trouble is, there is no reliable method of co-relating CUP and PSI over a broad range of calibres. Some ctgs., like the .44 mag, and .45 Colt, .45/70, .450 Marlin and .458 Mag. run identical or very close numbers, CUP and PSI, whereas others, like the larger cased, small bore magnums show vastly different numbers at the same pressure.
: It was indeed a shock some years back, to learn that 'normal' max pressures were in the 63,000 to 65,000 PSI range for modern rounds and some not so modern.

--------------------
Daryl


"a gun without hammers is like a Spaniel without ears" King George V

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400NitroExpress
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Reged: 26/11/03
Posts: 1154
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Re: PSI vs CUP [Re: bonanza]
      #85861 - 19/09/07 03:18 AM

Well, at least it's good for a chuckle.

--------------------
"Serious rifles have two barrels, everything else just burns gunpowder."

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bonanza
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Reged: 17/05/04
Posts: 2335
Loc: South Carolina
Re: PSI vs CUP [Re: 400NitroExpress]
      #85865 - 19/09/07 10:13 AM

'bout the only thing a fella can depend on is 40,000 cup is less than 60,000 cup. Trying to extrapolate more than that can make for an unsatisfactory afternoon.

--------------------


"Speak Precisely" G. Gordon Liddy.

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"I''m the dude playing a dude disguised as another dude."

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