Welcome, Hammyton!
I'm sure there are lots of methods people employ to determine speed. Personally, I usually track my targets with radar and get a speed estimate as they move between two points. I'll simply use the stopwatch and see how far they travel in a given timeframe. The nomograph is really helpful for this. When they get to visual range, I'll use the method you mentioned using the stadimeter and see if the speed estimate is close to my own calculations. Hope this helps some!
Good luck and good hunting!
Howler
