Ballistics of guns I am looking for mathematical texts or material on ballistics of guns. So far the only reference I have been able to locate is Ballistics: Theory and Design of Guns and Ammunition  by Carlucci and Jacobson. Are there any more such books or online notes which explain the mathematical properties (equation of motion etc) in gun ballistics?

Nonsense.  Ballistics maths is very well understood and incredibly easy.  Certainly a knowledge of the basic Newtonian physics is a good background but the mathematics itself is basic numerical integration in most cases, based on the work of one Fransesco Siacci.  The definitive book today that most professional ballisticians use for small arms ballistics is "Modern Exterior Ballistics" by Robert McCoy.  He worked at the Ballistics Research Laboratory Aberdeen Proving ground for a number of years and he gives a comprehensive history of the subject.
The book also includes the listing of a BASIC program for Point Mass Model approximation (the most widely adopted modern adaptation of Siacci's formulae) and that basic program itself (including source code) can be found on several locations on the www - just search for "MCTRAJ". 
