Re: Ballistic program w/ DA
Density altitude is calculated from atmospheric pressure, temperature, and humidity. If you have a device which calculates DA, it also measures those quantities, which can be plugged into any ballistic program.
In other words, there's no real reason to have a program which will take a DA input.
In addition, muzzle velocity is a function of temperature, which several ballistic programs will compensate for. So, you need the temperature input separately, so you might just as well enter the pressure and humidity.