Do we forget that cops were primarily still using 6 Shot Revolvers well through the mid 80's? It wasn't until after 1986 that most departments then relented and went to autos.
Capacity wasn't really an issue then... and honestly really it's not even an issue now.

Ray Chapman, used to say that the 125-grain Magnum load’s almost magical stopping power was the only reason to load .357 instead of .38 Special +P ammunition into a fighting revolver chambered for the Magnum round. I agree. - Massad Ayoob

Paradoxically it is those who strive for self-reliance, who remain vigilant and ready to help others.