Jeff, From OnTarget2...using calculated velocities nor chronoed velocities

My 481 grn arrow should be shooting in the mid 270s, with 82.14 ft/lbs KE.

If I switched to a 360 grain arrow, my speed should bump up to 306fps, but 82.14 dwindles down to 72.98 ft/lbs KE.

So by using calculated speeds, there is a 10 ft/lb KE difference....granted this will likely be less when I chrono it, it still kind of shocks me.
Im intrigued enough to go chrono my bow now with the two weights and plug the numbers in to compare....perhaps the weight difference helps more than I originally thought.

Using those speeds and weights in a standard KE calculator, I get 81.97 and 74.87 respectively...still a noticeable difference.