This is a free ballistic calculator for use with Windows Excel and any pocket PC / Windows CE that has Excel installed. "Black Berry" "Windows Mobil smart phones"
FYI: you can pick up used "pocket PC's" cheep on ebay.
Provided you input the right data to start, this is one of the most accurate calculators i have used. Using this in a PDA has scored me 1 shot hits on Groundhogs out to 460 yards with light little 223 40gr Vmax with my flat top AR. And just this summer "2010" i now have made a 882y, 1/2 mile kill on a groundhog with a 60gr 223 Btip.
Best if used in conjunction with a good laser rangefinder. Just laze the target, input that number to the top box on the PDA screen, put in the wind, temp and slope data if you have it and set your scope to the settings the calculator shows.
The original spread sheet was by http://www.jacksonrifles.com/ballistics.htm
Acknowledgment: Methods and formula used in this spreadsheet were developed by Prof. Arthur J Pejsa, http://www.pejsa.com/
Along with data and help from some of the guys that hang out on http://www.longrangehunting.com/forums
I have added many new things, like slope true range, range cards formatted to print 3.5x5 index cards, quick input screen for PDA's and more.
Russ Ring russr123 (AT) yahoo DOT com
FILE:=> Excel Ballistic Calculator "FBC-v3.1.xls"
Free Printable Targets
FILE:=> 25y-100y-200y-300y-400y-1MOA grid printable TARGETS
SCREEN SHOTS: Below
I have just bought the Knight's BulletFlight L2 and "Ballistic" for my Ipod, using the same data, both are with in 1/2 MOA or less out past 1000y when the data is matched to my spread sheet.
But, if i was going to buy another for the Ipod / IPhone, it would be "Ballistic FTE"
By the same people that bring you the Gold Standard of ballistics.. JBM
For the cash, it has a lot more features then BulletFlight.. Just make sure to get the FTE version, the cheaper version isn't as useful with out "HUD display"
If you have a Palm, you have a few free options, PSSF pocket SSF while it does has some great features, BUT, i have not found it to be that accurate.
The 2nd option would be Ballistic v1.0 While not as nice looking as PSSF, it is way more accurate in the calculations.
If you can open XLS on your palm, then try my sheet, but not sure if all the features will work.
If you have a Droid, do a market search for "Shooter" (Ballistics)
by seankndy, its 9.99 its the best prog hands down for droid.
Free version, supporting G1 and G7 models. Will only save current ballistics profile. Regular version will allow saving multiple profiles.
"Truing" your ballistic software
You can calibrate most software and is simple enough too do.
Some of the elements in the video “Magpul” are correct for other software, like actually shooting to a range that puts the round around 1300fps. (example)
The steps are simple enough, calibrate your scope and if necessary adjust the software using the sight offset, click value, etc. This will work with most software to include the iPhone Apps.
Then, calculate actual drop. You can start at 300 yards to begin. At this range you can adjust your BC if necessary. The BC will move based on the rifle shooting it. For example BulletFlight has an option in the utilities area to adjust BC based on Drop. it will give you a new G1 or G7 which you can then input into your data section.
Lastly you can calibrate the drop out to 800 yards like the video. Checking at distance is the final step, but you should have at least choreographed your load to start with, if you haven't then some software does have functions to adjust it based on drop.
Certain software has a DK function to bend the curve, this is used in place of adjusting the BC or MV, so you can do it a number of ways with a number of different software solutions, not just the Horus. Remember he was hired by Horus in the beginning to work and sell Horus methods and products, so of course they are not going to inform you of other methods.
Calibrating the system like above I have taken software like Field Firing Solutions and Patagonia LB3 out to distances beyond 2000 yards with very successful hit rates. Inside 1500m the first round hits where more consistent than when you didn't do it, and at 1000 yards and in it was too easy with a rifle like a 338LM.
The system calibration should be:
1. Muzzle Velocity using a chronograph
2. Scope calibration to at least 48"
3. Drop to 300 yards to tune with then
4. Drop to to 800 yards to fine tune.
MIL Dot scope screen