I was wondering if anyone here could lend some suggestions for books or literature on bullet trajectory physics. I'm trying to better understand the basis for ballistic software. What assumptions they make, how they set up there models, etc... With this knowledge I want to see if I can make any improvements or develop my own program. Just for a little background, I have a degree in Chemical Engineering so the more technical the better on literature. Also please lend some insight to what you like or dislike about current ballistic software. Thanks for the help in advance.