Exterior Ballistics. Modern Ballistics– It was an epiphany; I was out hunting with Joe, the designer of this software. I saw him take some measurements and punch a few numbers into his calculator. Seconds later he dialed in the number “5” on his scope’s elevation turret. I noticed the calculator had “5 MOA” showing on its display. When I asked him what it meant, he told me that his scope is set to indicate sight angle directly (the angle between the bore and the scope’s line-of-sight). Ah Ha! Never mind what your zero was last week, in what atmospheric conditions, and where you need to go from that setting to achieve your desired settings for this shot, here, today, under these different conditions. It does not matter. What matters is the indicated sight angle for this distance, here, today, period. No “come-ups” or “come-downs” based on some unknown sight angle from some earlier shot. This makes the program much more flexible, user friendly, direct, and relevant. If you’re interested in knowing where your bullet will hit on the first shot, if you want to know in advance things like group sizes, velocities and bullet drop at various ranges, probabilities of hits, sight picture and much more, all tailored specifically to your load, firearm, and local conditions, this software is for you.

Some user restrictions apply.
http://www.modernballistics.com/