There's a discussion on another forum about pressure differences between the .223 Remington and the 5.56 NATO rounds. From what I've been able to find, the spec is 60k CUP for the 5.56 versus 50k CUP for the .223. Is there a PSI spec for the 5.56? (I understand that the two measuring systems don't correlate well).
The discussion on the other board surrounds the necessity of crimping primers in the 5.56 due to the higher pressure. My own opinion -- speculation really -- is that even at 60k CUP, crimping primers should not be the cause of primers popping out of cases. Insight would be appreciated! Thanks.
