JBM Small Arms Ballistics
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JBM - Calculations - Changes

18 January 2006 -- The bullet drop with a non-zero cant or line of sight angle is now calculated with the flat fire (zero cant, zero line of sight angle) elevation and azimuth.

19 January 2006 -- Modified the output of the Trajectory Card output to include wind speed and make it a little easier to read.

28 January 2006 -- Reduced the minimum vital zone radius to 2.0 inches.

30 January 2006 -- Added mil "clicks" to the outout of the trajectory routines. Also modified the output of the 3x5 card printing.

2 February 2006 -- Added fractions of mils, inches and centimeters to the drop units. [I don't know if there are any scopes that use fractions of centimeters, it's just easier to do it all at once.]

4 February 2006 -- Modified the drop units again. Drop in fractional inches are at 100 yards. Drops in fractional centimeters are at 100 meters.

5 February 2006 -- Modified the output some. Dividers between different sections of input values. Also added energy at maximum point blank range.

7 February 2006 -- Fixed units on elevation and azimuth.

27 February 2006 -- Fixed McDrag nose radius ratio calculation.

11 April 2006 -- Added Free Recoil and Modified Point Mass Trajectory calculations.

22 May 2006 -- Added Drag Function Conversion calculation.

7 October 2006 -- Modified the output of the trajectory calculations to show corrected pressure when a corrected pressure is supplied. Also removed the corrected pressure option from the Modified Point Mass calculator since it is not used.

21 November 2006 -- Added JavaScript to use cookies to store and set user's input values.

19 January 2007 -- Fixed bug in azimuth correction.

29 January 2007 -- Added Elevation, Azimuth, Elevation Correction and Azimuth Correction to the trajectory card calculation.


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