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 Post subject: PSI vs LUP
PostPosted: Fri Nov 06, 2009 11:12 am 
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Location: San Jose, CA
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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 Post subject: Re: PSI vs LUP
PostPosted: Fri Nov 06, 2009 11:38 am 
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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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 Post subject: Re: PSI vs LUP
PostPosted: Sat Nov 07, 2009 7:30 am 
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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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 Post subject: Re: PSI vs LUP
PostPosted: Sat Nov 07, 2009 5:13 pm 
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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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 Post subject: Re: PSI vs LUP
PostPosted: Sat Nov 07, 2009 5:32 pm 
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So what is the maximum LUP to be used in a load?


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 Post subject: Re: PSI vs LUP
PostPosted: Sat Nov 07, 2009 5:41 pm 
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Location: Kearney NE
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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 Post subject: Re: PSI vs LUP
PostPosted: Sat Nov 07, 2009 5:44 pm 
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Joined: Wed Jan 23, 2008 10:19 am
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Location: texas
Fuzzy, from Lyman manual #1: the maximum L.U.P. for ALL
gauges was 10,500 L.U.P.


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 Post subject: Re: PSI vs LUP
PostPosted: Sat Nov 07, 2009 10:53 pm 
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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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