My first centerfire handgun was nickeled, 4", model 19. Back in the day, I shot many police combat courses with the model 19, because revolver courses were the only competitions available in my area. Don Hamilton, Gregg Derr's mentor, did the trigger work on my 19 and it was a perfect, all around handgun. Wish that I still had it. I have a model 66 now. Same gun, just stainless steel. After having shot them for 47 years now I can say in all honesty, if your going to give it a steady diet of . 357 carry ammo, it will probably loosen up a bit. Better to use a 586, or a 686 for the steady diet of .357. If shooting .38 , or 38+p and .357 only once in a while, you're good to go. If I could only have one of the two mentioned, I would choose the model 19 for sure. It's a forever keeper.