castnblast, said "I don't know of any magical rule of physics that allows a rifle to produce more velocity with the same amount of pressure, all else being equal. "
You may want to qualify that statement. to discriminate between peak pressure and the energy under the pressure curve.
I agree that velocity is a good indicator of pressure, but to really know, it helps to measure and plot the pressure curve over the entire shot.
In my experience you will see many instances where the same velocity will be generated by different maximum chamber pressures.
crshelton. You are correct of course. my comment was meant to compare the SAME components used in different rifles. Some powders DO allow the same or lower peak pressure with higher velocity, something most of us aspire to achieve in our loads. But with the exact same components, pressure = velocity. Can't see how it could be different.
