Help - Figureing out ballastic issues

[Klem]

They are all slightly different and are theoretical simulations anyway. None are likely to match exactly your gun in whatever conditions on the day. In your shoes I would shoot the 800yds (and at as many other ranges as I could) to get a feel for your ballistic curve. Then see which calculator is the closest match. Any of the estimations will get you on paper.

I use Applied Ballistics on the Kestrel for careful shooting and Bullet Flight on the phone for quick and nasty calculations.