Im not selling, shilling for or associated with the creator of this software, but downloaded it a couple months ago. While I haven't had the opportunity to try it on the range or in the field yet, its kind of interesting. just plug in the info and it tells you what to do and expect. Its free too.
hopefully they will make it fit on a smartphone , that could be handy in the field if you really get nitty gritty about it.
" Modern Ballistics: the world's most sophisticated small arms exterior ballistics program for the personal computer. It runs on all modern Windows (Win98 and greater) computers. In addition to the usual tables and graphs of drop, velocity, and windage, Modern Ballistics has these unique features:
Sight Angle. Most long range shooting instructors refer to your gun having a "Zero" that depends on the altitude, temperature, bullet velocity, and ballistic coefficient of the bullet. This is wrong. The gun is constant with respect to the environment. The drop of the bullet changes, not the scope setting. This scope setting is referred to as the "Sight Angle" and is unique to Modern Ballistics. This unique way of looking at exterior ballistics makes a dramatic simplification to practical application of modern computing power to the solution of predicting the path of the bullet once it leaves the muzzle of your firearm.
Generate probabilities of hits. These are based on your wind error estimates, muzzle velocity standard deviations, and inherent accuracy of the load in the gun.
Simulate the sight picture. See various target shapes and sizes with different types of iron and optical sights at user selected range, and conditions. See how your hold must vary at 300 yards versus 800 yards. Change the wind, altitude, temperature or other conditions and compare your hold compared to the ideal hold calculated by the computer.
Tracer simulation. Enable the tracer simulation to see the entire path of the bullet from your muzzle to the target and beyond. Watch it arc up and curve with the wind on its way to a distant target.
Group sizes. Simulate the effect of wind estimation errors and shots per group on the total size of your groups. Is a 1.5 inch ten shot group better accuracy than a 1 inch three shot group? Use this program and find out. Compare the use of a somewhat inaccurate but wind resistant cartridge with that of a more accurate but less wind resistant cartridge -- under what conditions would you chose one or the other?
Field Ballistics. What is useful for your desktop computer in your home is not what you need in the field trying to make a shot at a moving target 500 yards away on a cold day far from your training range. Using the same powerful and unique Sight Angle way of solving the exterior ballistics problems you can get your ballistics solutions via any web browser. Field.ModernBallistics.com was written especially for mobile devices such as cell phones and PDA's with low power CPU's and small screens. Use the same fast and accurate algorithms in Modern Ballistics anyplace or time you have access to the web with your personal web browser."