I'm really, REALLY, trying to complete and release the 1.0 version of our software that should give comparable results to Bryan's. It's not G7 but G7 should be easy to convert to our solution, and the software could be made to accept G7 input. Currently we're working on high-velocity G1 BC ( the most typical BC advertised by manufacturers ) and some rough knowledge on the shape of the projectile. When we have better data like Lapua's radar data or G7, we can bake our solution to match those trajectories exactly ( well, to the point of insignificant error, at least ) .
We're just a couple of hobbyists, but what we have should be adequate for all practical purposes, should someone be willing to take up electronic distribution of this thing. Remember, it's not just for smart phones but for all J2ME ( CLDC 1.1 MIDP 2.0 , if I recall correctly ) enabled phones, that should cover most phones manufactured this side of year 2000
Error comparison, long range optimized average G1 and our method when compared against Lapua's radar data. ( 250gr .338 Scenar around 2950fps )
( Shoot! was the project name until now but will not be a product title as it is already in use )
The chart shows error in 0,1 mrad clicks so a value of 1 equals roughly 1/3 MOA of error compared to radar data. Distances are in meters, so 1400 m is about 1540 yards. As you can see, our method follows the radar data very closely for supersonic velocities.
The software itself is a very simple "field firing solution" without extra clutter, it just outputs your elevation and windage values. Coriolis and spin drift are included ( using Bryan's formulas ) in the values so after you set up your configuration of rifle ( LOS-bore etc. ) and zero conditions ( temperature, muzzle velocity etc. ) , all you need to do is update current conditions gathered in one user menu screen ( temperature, station pressure, latitude, shooting direction, wind direction / magnitude , range , incline angle ) and you're ready to shoot. Change any value and the output ( constantly displayed at the title bar on top of your screen ) updates immediately to reflect the changes.
There's a small set of ready-made configuration files for bullets we have ballistic data for ( mostly bullets that Lapua radar data is available for ). You can add your own or manipulate the existing files.
I know some of you like to have more stuff in your PDA ballistic software but we originally didn't build this thing to be all-inclusive or to make profit, we built it for ourselves to use in high-stress situations like hunting and tactical LR competitions. It's built so I don't have to navigate any screens or go through charts of terminal velocity / energy, drop in inches etc. tables, when I'm in the field, I just want to know two things and I want to know them QUICKLY: What elevation and what windage to put on my scope turrets or reticle.
If you have interest and/or means to distribute mobile software, please pm/e-mail me. If you feel this is ad-talk/spam , please inform me and I will stop immediately. I'd just like to see this software out there and I can sometimes get over-enthusiastic about it.