Quote:
Originally Posted by DouglasCole
You sure that second m/s is divided by 1000? A Joule is a kg m/s^2, which is mass in kg, velocity in m/s. There shouldn't be a second divisor there.

Double checking...
130 grain bullet is 8.4238583 grams
.38 inch Diameter is 9.652mm
1180 feet per second is 359.6639885 meters per second
Plugging the same data into your spreadsheet, and then looking at your "used column" (Column F in the Excel spreadsheet titled as Ballistics Model Jan1  2012)
Grains 130  used .008424 kg
Inches .38  used .009652 m
FPS 1180  used 359.664 m/s
Your formula for Joules lists the formula =0.5*D3*D6^2 where D3 is Kg, D6 is M/s
Sorry  was correct on one, incorrect on the other...
Only the one is divided by 1,000 to get it into units of Kilograms. The meter's per second is not km per second... (bad Hal, no cookies for you!)