Just to be a nit picker...... smile
The divisor 450,240 was change back in the late 60's or early 70's to 450,400. Apparently a group of physicists determined the results of using the earlier number didn't quite line up with some newer or more complete observations. Or so I was told a physics professor in college.
The difference in the end result, at least as far as we're concerned, is extremely small...about 1 foot pound with a 30/06 180 grain factory load.

Last edited by MickeyD; 02/27/20.
~Molɔ̀ːn Labé Skýla~