I'm looking at a Model 66-4 with 2 1/2" barrel with only 500 rounds through it that comes with the original case. I'd like to hear thoughts on this model as I know little about it other than it being the SS equivalent of the M19.

I wouldn't plan on a steady diet of full bore 357 rounds but probably a lot of +P and 900-1000 fps lead SWC's more than anything else. I may consider it, if bought, a CCW carry.