I'm looking at some pix on here of various revolvers with reddot sights. Some are 6" barrels and it got me thinking. Is there any advantage to a longer barrel once you've stopped using the front/rear sights? Wouldn't the advantage, if you're using reddots, be in the best balanced revolver?

Using slower powders, my experience is that cartridge performance drops 50-75fps per inch of barrel. I would expect +100fps lower in a 4" vs 6" revolver. Important? That's up to you.

I also find the weight of the barrel helps steady the pistol giving you a better shot

I prefer a 4 or 6 inch barrel,whether I'm using red dot or a conventional scope.Personally I think it balances better when shooting offhand.

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Garage Logician

Everything said above +1. Better velocity, steadier sight picture with the counter weight.