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Old February 12, 2013, 04:02 PM   #21
Brian Pfleuger
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Join Date: June 25, 2008
Location: Western Colorado, finally.
Posts: 19,118

I'll have to get back to you with some actual numbers but I can tell you that the 19.7gr I measured before was fired, unsized mixed headstamp. I have checked any of the current batches I'm shooting.

As a point of information, I don't recall ever seeing a max load with 124/5gr bullets higher than 13.0gr (or lower, I think. It's actually remarkably consistent, considering some variance in other data) and EVERY source I've seen lists it as compressed. It's also universally (or nearly so) accepted/expected to be a compressed charge, as it is the "standard" answer to solving bullet setback issues in the Sig.

So, whatever case capacity results in 13.0gr being compressed is probably very close to correct.
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