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Brian Pfleuger · February 13, 2013, 08:10 PM

I didn't measure the length before sizing. I'll check another one tonight.

Based in the 18.8gr post-sizing measurement, QuickLoad thinks that 14.6gr AA9 is 122% compressed. With Clark's information that AA9 is essentially uncompressible, I find this load to be a near impossibility.

It seems like I see 110% compression being talked about as a rough estimate of where things start getting dicey with the bullet being pushed back out and even case deformation issues. I can't see 122% of most any powder being practical, say nothing of one that doesn't compress.

Although.... It also thinks the standard 13.0gr charge is 117% compressed. Maybe QL's VWD for AA9 is off.

February 13, 2013, 08:10 PM	#26
Brian Pfleuger Moderator Emeritus Join Date: June 25, 2008 Location: Austin, CO Posts: 19,578	I didn't measure the length before sizing. I'll check another one tonight. Based in the 18.8gr post-sizing measurement, QuickLoad thinks that 14.6gr AA9 is 122% compressed. With Clark's information that AA9 is essentially uncompressible, I find this load to be a near impossibility. It seems like I see 110% compression being talked about as a rough estimate of where things start getting dicey with the bullet being pushed back out and even case deformation issues. I can't see 122% of most any powder being practical, say nothing of one that doesn't compress. Although.... It also thinks the standard 13.0gr charge is 117% compressed. Maybe QL's VWD for AA9 is off. Last edited by Brian Pfleuger; February 14, 2013 at 07:51 AM.