Calculating muzzle velocity from powder burn rates
Can anyone come up with a burn rate for a powder? Any powder really. I looked at the formula that was created by Powley(POWLEY.HTM~) but that assumes that the psi is a constant for the equation unless I have read it wrong. I am currently trying to write a program that does something very similar to the slide calculator mentioned for my engineering class but I have been running into roadblocks everywhere trying to calculate a crude muzzle velocity given the bullet weight, caliber, grain. Is this impossible? Any suggestions on other ideas to create a simple program with nearly the same topic? Any and all advice is greatly appreciated!!