I was looking at some data for several cartridges. I looked at the start loads, and max loads and took the pressure and divided it by the velocity to get a psi per fps number.
For instance, a 30-06, 150gr start load at XXXX velocity and XXXX pressure was 17psi per fps. At the top end load it was 19psi per fps. And for other 30-06 based cartridges that seemed to be about the norm. 17-18psi per fps of velocity at the low end, and 19-20psi per fps at the top end. I just randomly chose loads in the 30-06, .280, and .270...so there may be some differences.
My question is, knowing this information, can one reliably predict pressure increase by velocity? Does the increase remain constant, or does there come a point on the low end where it would decrease dramaticly, or increase exponentially at the top end?
I hope I asked that right.
