Originally Posted by BrentM
I agree about max with the exception the COAL used combined with primer brands can vary pressures enough that book max is not max. Then again you can see pressures well below. My 6.5 is 1.5 below and on the edge.
Totally agree with your entire statement above. As far as what i put in bold, my deal is that lacking a quantitative way to measure pressure, I stop at book max unless I see qualitative pressure signs prior. Not saying my way is the right way, but it gives me a comfort level.
I am afraid of "invisible pressure" if such a thing exists - I have a feeling it does as I have seen Lapua brass eat some loads that I wouldn't be comfortable shooting and look no worse for wear. I doubt it is truly unsafe in modern rifles, but my ignorance of what these limits are keeps me following the book.
How bad are the extractor marks on that factory brass? Any chance you put it on a chrony?