The double and single action is very slick on both the 627 Performance Center and the 627 Pro. The 627 PC has more of a competition action. The 627 Pro is a different feel in both the single and double action; it has more of a duty weapon feel to it. The 627 Pro has a Wolff mainspring from the factory and a wider trigger than the 627 PC. They are both great. I would not say than one is better than the other. Also, like the 627 PC, the 627 Pro has a spring loaded front sight making sight replacement quick and easy. If one was to choose between the two, you would only be sacrificing an inch of barrel length going with the 627 Pro. I love the fact they both use moonclips and love the 8 shot capability. Both are true works of art. I really don't understand why S&W does not promote the 627 Pro better than it does.

__________________
"I'm just a dog chasing cars."