Unless you were holding up the class loading/unloading clips, I see no good reason for such a prohibition.
If they don't want people using revolvers, that should be stated clearly in the information provided for folks wanting to sign up. Since it was not, I would say that unless you were holding up class in some way, what happened was totally unacceptable.
I think it would be good to provide the class information for folks who might want to take a class and would use a revolver. That's clearly not the class for them.
This.^^
If someone designed a class that favors pistols/magazines, then it would be courteous to state it to prospective students.
Maybe the instructor was never trained and experienced with using DA or DAO revolvers, and was uncomfortable trying to adjust his teaching methods to accommodate them?
Most LE firearms instructors from the time period when revolvers were being phased out in favor of hi-cap pistols were generally versed in designing courses-of-fire, at least for off-duty quals, where scoring and reloading were easily adjusted for the revolver users. No biggie.
Now that smaller single-stack pistols have become much more popular (again
), and snub revolvers have been making quite a comeback (stimulating gun makers to take advantage of that growing market
), you'd think that the savvy commercial instructors would be looking for ways to encourage and benefit from those folks who wish to carry small pistols and/or DA/DAO revolvers. It's not like it's all that hard to include some flexibility in courses-of-fire that can accommodate such folks.
Perhaps next time, maybe ask if your choice of gun/gear is going to be considered appropriate for the training venue? While you'd hope the instructor(s) would list any requirements and prohibited gear, it might be prudent to avoid assuming things. if nothing else, it can help prevent frustrating circumstances for both instructors and students.