I have no experience with the modern Model 66 (3" bbl?) but the older 2.5" seems to be regarded as more of a safe queen than an EDC. Too heavy IMO and the RB begs for an aftermarket grip. I own the snub 2.125" Model 60. It is a fine revolver, but not a range gun. It is designed for close-up use when things go south. I use 110gr .357 JHP ammo, either W-W or R-P in mine. It is much more controllable than the ultra-light 340s. Mine wears the UM boot grip; the factory boot grip knock-off will serve.No, I don't use .38s in this gun. My .38 revolvers have first dibs on that ammo.

Kaaskop49
Shield #5103