Thought I'd add this one in, someone else found it, but, it is one of the more complete illustrations of case pressure signs, with decent explanations, I have seen.
http://www.primalrights.com/articles...nding-pressure
And as an aside, a thread discussing loading manual pressure, and the foibles of trying to estimate pressure. You need to read the whole thing, it gets some answers from people who really can answer some of these questions and point out the pitfalls, and an explanation of how loading manual pressure info, is arrived at.
http://www.24hourcampfire.com/ubbthr...?#Post11366654