Quote:
Originally Posted by blujax01
A fools exercise? Nah.
Interpretation and extrapolation of pressure versus volume data has to be quantifiable, predicable and measurable.
A scientists exercise is more like it.
But that I ain't so I won't fool with it.  |
Well, I am a no-kidding physicist, and tell you for true the assumptions in the OP are NOT CORRECT. There is a relationship betweeen case volume and pressure ( it is called the expansion ratio), but it is NOT LINEAR. Safe reloads work on a small part of the pressure curve that is flat enough to appear linear, but as you go higher, it becomes exponential. You can stand in the middle of an OK wheat field and swear the earth is flat, but that does not make it true.
In plain English, extrapolation of pressure data IS a fool's exercise. Internal ballistics are not only more complicated than most people imagine, it is more complicated than most people CAN imagine. Actual internal ballistics equations are a system of partial differential equations of the first and second order.
Here's a simplified summary
Internal Ballistics