Re: best computer balistics software?
I use the same Excel spreadsheet that Dave King does (in fact we both had input into the design of it) and it is by far the most versatile ballistics computer I have ever used.
It is very user friendly and as Dave mentioned can be easily modified to show whatever you would like to see in a ballistics chart.
To go one up on Dave, I have a copy loaded into a pocket computer that runs Excel CE so I can do ballistic calculations right in the field. I attached a small plastic thermometer to my bipod and I have a map (or GPS) to tell me the elevation. With a windmeter I would have a complete field ballistics laboratory.
In southern Alberta, temperatures can range from +30c in the summer to -30c in the winter and no pre-done drop chart can hope to be accurate under those sorts of conditions.
This setup is really the cat's meo when the weather does not go your way. Air temperature is one of the biggest factors influencing the bullet's flight over long distances so the ability to correct for it in the field is invaluable.
All should note that the G1 drag model used by most ballistic computers is not very accurate as the bullet's velocity approaches the transonic range. Also, due to the many variables in a ballistic calculation, most drop charts will start to show some variation from reality beyond 600 yds or thereabouts.