Your damn close to my point.
Among the things that affect the internal performance (pressure and velocity) of a given cartridge & bullet are:
Capacity of the powder chamber (a function of chamber size and shape, case construction, and bullet seating depth)
Relative burning rate and burning characteristics of the propellant powder used
Amount of propellant used and how much it fills the powder chamber (load density)
Diameter, weight, and the bearing area of the projectile
Length and interior dimensions of the barrel
Uniformity and speed of ignition of the propellant powder (Primer and loading density related)
Temperature of the propellant prior to ignition
Barrel freebore
Neck tension
The 2nd one catches it.
If I use a powder that has a steep rise and fall pressure curve is it possible that one runs out of gas at a point in the tube where it slows down the bullet due to friction and atmospheric pressure?
Where a powder with a more gradual rise and fall would have enough gas to keep accelerating the bullet all the way to the muzzle which in turn would give me more velocity at the same pressure limits?
