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fuzzy-one
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Post subject: PSI vs LUP  Posted: Fri Nov 06, 2009 11:12 am |
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| Field Grade |
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Joined: Thu Aug 20, 2009 12:38 am
Posts: 55
Location: San Jose, CA
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I know that for 12 gauge maximum PSI is 11,500. What is the maximum allowed using the older LUP standard? Also what is LUP the acronym for?
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BobK
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Post subject: Re: PSI vs LUP Posted: Fri Nov 06, 2009 11:38 am |
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| Crown Grade |
Joined: Sat Feb 05, 2005 3:51 pm
Posts: 2970
Location: E. Rochester NY
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LUP = lead units of pressure. It amounted to how much a lead "crusher" got compressed by a piston from the forces during firing.
There is NO way of comparing it to "PSI" readings, which use an electronic strain-gauge measurement.
BobK
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BobK
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grousehunter49
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Post subject: Re: PSI vs LUP Posted: Sat Nov 07, 2009 7:30 am |
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| Presentation Grade |
Joined: Mon May 07, 2007 5:09 pm
Posts: 728
Location: NL Canada
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I read in a shooting mag lately, that the differance is not enough to make a differance, but don,t take my word for it, you know what they say about what you read?
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My only regret is that I won,t live long enough to wear out my Franchi 48AL.
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RandyWakeman
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Post subject: Re: PSI vs LUP Posted: Sat Nov 07, 2009 5:13 pm |
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| Crown Grade |
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Joined: Sat Sep 09, 2006 10:02 am
Posts: 4615
Location: Plainfield, IL
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grousehunter49 wrote: I read in a shooting mag lately, that the differance is not enough to make a differance, but don,t take my word for it, you know what they say about what you read? Sure it is-- consult Lyman's, etc. Or call any reputable powder manufacturer.
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--Randy
http://randywakeman.com
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fuzzy-one
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Post subject: Re: PSI vs LUP Posted: Sat Nov 07, 2009 5:32 pm |
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| Field Grade |
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Joined: Thu Aug 20, 2009 12:38 am
Posts: 55
Location: San Jose, CA
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So what is the maximum LUP to be used in a load?
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Burnt Powder
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Post subject: Re: PSI vs LUP Posted: Sat Nov 07, 2009 5:41 pm |
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| Reloading Expert |
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Joined: Sun Aug 24, 2003 2:31 pm
Posts: 11931
Location: Kearney NE
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fuzzy,
The MAX LUP is whatever is listed for the load data you are wanting to use out of a data booklet.
If you find a load you want to use and it's listed as a pressure in LUP, then that's max.
You don't have LUP pressure testing equipment anyway. It's a moot point!
I don't know that there even is a LUP pressure max. That's been obsolete since Hector was a pup. He's been dead now nigh on 10 years, and he was an old dog then when he died!
Don't get all wrapped arround an axle regarding LUP. It was more or less like the SWAG pressure testing process anyway!
BP
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A wife and a steady job have ruined many'a good biker!
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savage2400
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Post subject: Re: PSI vs LUP Posted: Sat Nov 07, 2009 5:44 pm |
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| Field Grade |
Joined: Wed Jan 23, 2008 10:19 am
Posts: 55
Location: texas
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Fuzzy, from Lyman manual #1: the maximum L.U.P. for ALL
gauges was 10,500 L.U.P.
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fuzzy-one
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Post subject: Re: PSI vs LUP Posted: Sat Nov 07, 2009 10:53 pm |
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| Field Grade |
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Joined: Thu Aug 20, 2009 12:38 am
Posts: 55
Location: San Jose, CA
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Thanks savage 2400 for the LUP acronym and thanks savage 2400 for the Lyman info on max LUP.
fuzzy
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