something fun to how about reloading

[John1 S]

Going form FPS to miles per hour. The coeffcient of .681818 X FPS = MPH. Like .681818 X 1250 FPS = 852 MPH

[gun-nut]

Amazing is it not! I do that myself from time to time just for the fun of it.

[rcairflr]

Or you could go from MPH to FPS (MPH x 1.4666)