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Old June 13, 2012, 08:23 PM   #18
Clark
Senior Member
 
Join Date: December 4, 1999
Location: WA, the ever blue state
Posts: 4,678
Quote:
rebs

The .223 Rem is registered at 55 kpsi, and I load it at 75kpsi and get long brass life.
are you loading this in an AR 15 or what ?

This is a piece of 223 brass fired in one of my AR15s.
Notice the extractor and ejector marks on the brass?
There are these problems, plus the AR15 is not adjustable for variations in barrel gas pressure - time.


Here is a work up from 66 kpsi to 99kpsi in 223 in a Ruger #1.
Notice how much more supportive the breach face is in the #1?
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