[Pierre-Marie Baty]

I am using something similar but I always suspected it was wrong too... glad to be certain of it at last.

What you can do is to use PMTools to print your player's velocity when you're running and when you're walking, using different weapons, and see if one is always the half of the other (and if not, what fraction of it).

In order to keep pressing the forward key when you're in the console, enter "+forward" in the console. When you want to stop going forward, enter "-forward". Same for walking. You can use this to check your player's velocity while in movement.

*edit* P.S: be sure to do this when you're on a flat ground.