Looking for the math

[Mecharius]

Might check Bryan Litz web site here:

http://appliedballisticsllc.com

He has written software and books on the subject matter.

Sharp guy, and can do all of the math by hand. He is currently working at Berger bullets as chief of ballistics research.

The website its self doesn't seem to provide too much direct information after a quick digging through. But I think k I may be able to gain something g from it when compared to other resources. So thank you for sharing