The old adage I heard often when packing a revolver as my duty weapon 35 years ago was... "Six for sure".
This back when Browning High Powers, M1911s, S&W models 39 and 59 were the predominant semi-autos in the field of American LE and not so reliable with modern ammo.
If obligated to turn in my issued SIG 229 and required to pack a S&W model 10...no problem. I shoot it well and I feel confident with my abilities to defend myself or others with it.
As for those 7 or 8 shot revolvers...they scare me. Spent too many years with my 6 shot Model 19 Combat Magnum to ever feel comfortable with more rounds in a wheel gun. I would likely shoot six and reload.