Just for general information on trajectory;
I really like the web-based JBM Ballistics ballistic calculator.
Holds good result if you get the input data right and I use it a lot to predict how much effect different variables have on end result.
http://www.jbmballistics.com/ballist...culators.shtml
All the info needed (BC, weight, diameter, atmospheric conditions, etc.) can be easily found, but it is always best if you can get real chrono data for your ammo and your gun. The wall of input fields can be daunting, but spending some time with the Google machine will get you enough information to fill in the fields with accurate enough data to be useful.
Side note: I like to use 2,000 ft for elevation, as it gives good data for Sea Level to 4,000 ft out to 600 meters or so, unless you are going for high precision tasks.