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Yes I understand the work done principal, I just needed to adjust my thinking a little but yes I can see how it would fit in a pressure under curve definition be it a pretty basic one on todays...

CUP was measuring the deformation on a calibrated copper disk or cylinder after firing, I havnt heard of it showing area under curve before, is there a time component applied to it somehow to get...

Its an interesting topic. The calculation to convert cup to psi I was using is (cup x 1.516)-17902 which for 60000 cup gives 73000psi. Is there more accurate equation?
I have no idea...

Some things to think about here, firstly stating velocity/pressure without referencing barrel length and powder burn rate is not particularly useful. Pressure in internal ballistics is not linear,...

Ignore the advice and keep talking to Jaco. With out the yearning for better we would still be running around with stones and pointed sticks.

Im sure somewhere in the past the same words were spoken about the 222 rem and before that and before that. But the never ending search for a better mouse trap and a faster bullet goes on.

If you look at the modern case designs , creedmore , PRC etc it seems they are following the P O Ackley recipe with less taper on the case and steeper shoulder angles. There is little to improve...

From the other side of the fence, I have 3 improved cases. 243ai, 280ai and a 338 Norma improved. Fire forming is simply more shooting, I like shooting, the fire forming loads are generally as...