Can I interchange IMR 7828 and IMR7828ssc?
03-25-2009 | 10:17 AM
#1
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Nontypical Buck
Joined: Oct 2007
Posts: 1,625
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From: Southeast Alabama
Can I interchange IMR 7828 and IMR7828ssc?
My local supplier is having a hard time getting supplies in and I am about out of IMR7828 he has 2# of IMR7828ssc though. The bottle says to use the 7828 data,but will it be the same or will I have to develope a new load again? I fear itsthe later.
03-25-2009 | 10:35 AM
#2
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RE: Can I interchange IMR 7828 and IMR7828ssc?
My experience is its faster. But the old batch I had produced some of the lowest veloicitys out of my STW I ever seen. I didn't see any additional pressure signs, and groups were the same. I say approach with caution. If your load before hand wasn't pushing the envelope, then this shouldn't change. But if was .5gr away from locking up in your chamber or real flat primers, knock her down 2gr and rebuild.
03-25-2009 | 03:00 PM
#3
Nontypical Buck
Joined: Feb 2003
Posts: 3,067
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From: Garfield NJ USA
RE: Can I interchange IMR 7828 and IMR7828ssc?
From my experience with H4831 and h4831sc you should be able to use the same load data, it's supposed to be the same burn rate but smaller kernels for denser charges.
03-26-2009 | 05:11 AM
#4
Giant Nontypical
Joined: Feb 2003
Posts: 6,270
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From: Texas - BUT NOW in Madison County, NY
RE: Can I interchange IMR 7828 and IMR7828ssc?
As BC said, it should be the same. But I would test it just aswhen switching from one lot # of powder to another, since variations do occur, even though the powder is "the same".
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