I got in deep trouble with the ventura County rangemaster once.I had this brief flirtation with being an insecure security officer in College. I arrived with a prewar , 6" model 10 with the old long action and two boxes of Peter's 200 grain Super Police loads.
I set the day's best record and had half the participants begging to buy my smith, reveal my magic load and asking about the funny, one handed stance I took.
Rangemaster had 3 academy recruits driving him nuts with requests for 200 grain loads in 9MM parabellum, trying to shoot Camp Perry style vs Wever squat and wanting to book this 'Ed McGivern' guy to guest lecture.
I know of a guy in Arizona convinced the CCW instructor his SAA was more than adequate- after being firmly rejected to use a .44 Army 1860 reproduction.