Initial speed measuremnts by 1900?

[JorgeO]

In his "The Borchardt-Luger History" pages, M. Paul Regnier states that one of the parameters used by the Swiss army to choose the Luger was "Speed - measure of the initial speed, 5 shots per weapon"

http://www.luger-genesis.com/luger_h...e_specs_5.html

Today we have chronometers, but how was such a measurement done over 100yrs ago?

Thanks,