I just mentioned the 140 was also high to point out that the program he was using to calculate downrange energies do not add up his stated muzzle velocity. At 3350 FPS the downrange energies@ 450yds are 1906 FPE not the 2026 he stated based on the .485 BC of the Nosler BT
The results I posted were based on the velocities I recorded but with the altitude adjusted to 1000 feet since that is the elevation mentioned in an earlier post. At 6500 feet the 140 load calculates 2076fpe at 500 yards. That is based on the Point Blank program using .485BC, 140GR BT at 3350fps, 70 degrees.
There you go.Two sets ofcalculations based on the same bullet and velocity and two different results.Since neither can be proven correct both must be given equal credibility.If you really want to know the ballistics produced by your gun and load,chronograph your gun with the given load and shoot it to the distances that you want and see the real trajectory,not a calculated trajectory that often differs from the trajectoryproduced in your rifle.Since the trajectories differ,it is only logical that the velocity and energy will also differ.That is why I prefer to post data based on loads that I have actually chronographed myself.There is enoughquestionable data being passed around in loading manuals and ballistics charts,that we don't need to add tothe collectionhere.