[elkhunter11]

Originally Posted by Salavee

The way to estimate Muzzle velocity is to use measure muzzle exit pressure, not peak pressure. All else being equal , if exit pressures are equal , muzzle velocities will be equal.
I have yet to find two different powders, meeting the same resistance, that have identical muzzle pressures.
I can use a lot of different powders that produce identical chamber pressures, just by varying the charge weights but not so with muzzle pressure. Muzzle velocity begins at the muzzle. Peak pressures are noted for safety reasons, nothing else and corresponding muzzle velocities are only an approximation based on the various powder burn rates.

So how do you measure muzzle exit pressure?