![]() ![]() I also highly recommend Bryan's follow on Books for even more intermediate to advanced information. For the practically minded, this book is tough to beat. It's light on math, but heavy on advanced ballistics concepts. This book is not overly technical, but it's not simple either. It also has extensive measurements of drag data using the G7 drag function, which is the best match for today's long range bullets. If I had to have only one book on the subject, this would be it.īryan Litz's Applied Ballistics for Long Range Shooting is a newer and more accessible book for those who don't want to wade through McCoy's volume. There is some information to be gained outside of the math as well, but this is really a college text book at its core. If the words "solve a coupled system of first order ODE's with a numerical method" don't at least jog something loose in your memory, you'll probably not understand most of the book's math. It is not a book for those without a very strong math background. For the mathematically inclined, Robert McCoy's Modern Exterior Ballistics: The Launch and Flight Dynamics of Symmetric Projectiles is a great overview of both historical and modern methods. Open the file in the spreadsheet program of your choice, and you can edit it to print out your own range cards. csv file is a simple text file that common spreadsheet programs (Microsoft Excel or Apple Numbers, for example) can open. csv file?Īfter you get some results from the calculator, a button that allows you to download the results in a. Other ballistics calculators may not show this effect simply because they do not chart data at 1 yard intervals. It's more useful when you get out to 10-20 yards, where it will give you a a good estimate of how much you need to hold over in order to hit a very close target (assuming a 100 yard zero). At extremely short ranges, this is nonsensical, but mathematically correct. At very short ranges (say, 1 yard), it would require huge angular adjustments in order to get the scope pointed at where the bullet hits. This is the result of the bore being lower than the scope's line of sight. Why is there a huge increase in drop at very short ranges when units are set to MOA or mils? For the most stable and predictable flight, it is best to keep the bullet in the supersonic (black text) region. Red text means the bullet is subsonic, or under Mach 1.0. Yellow text means the bullet has gone transonic, or under Mach 1.2. Why are some rows of the results in yellow or red text? The range interval at which the results are printed in the trajectory table. The maximum range at which the calculation stops. If measured station pressure is available, use that. This is not the same as the barometric pressure reported by the local news, which has been corrected to the equivalent sea level pressure.Īs an alternative to entering pressure, it can be estimated based on altitude. The absolute (station) pressure at the firing site. The temperature of the air in degrees Fahrenheit. The units in which you want the results reported - Minute of Angle (MOA), milliradians (mils), feet, or inches. Strictly speaking, this is at the muzzle, but measuring the actual scope with a ruler should be close enough. The vertical distance between the centerline of the bore and the centerline of your scope. 90 degrees is a left to right wind from the shooter's perspective. The wind speed between the muzzle and the target. The range at which the bullet's path will intersect with your line of sight. You can measure this with a chronograph, or look it up in a reloading manual (feet per second). About the Ballistics Calculator How do I use the ballistics calculator?Įnter a BC and matching drag function, or select a bullet from the library and then enter the following variables: ![]()
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