I would imagine most of the respondents here use a chronograph. I've used six in the last forty+ years. Recorded velocities have been pretty similar from a cheap Chrony to an Oehler 35P.
I used mine for thirty or more years as well. The printer went back once for a rebuild (maybe replacement ) after many years. However, I stopped using the Oehler after I bought a LabRadar some years back. Certainly not a better chronograph than the 35P, just easier to set up.
