I think trigger pull is like pain ratings, meaning, it is very subjective. I have been shooting a High Standard Mark II .357 for over 30 years. The single action is very crisp and light but the double action is pretty heavy. I took it to a gunsmith years ago to see if he could lighten it. When I picked it up, it was much smoother, but still heavy. When I complained about it, he said "Son, that is a .357. You better mean it when you pull the trigger. That's why it is heavy". Having said that, I have fired other revolvers that had much smoother and lighter triggers.

So when it came to the Sigma, I read all the horror stories about how the trigger was so terrible blah blah blah. The trigger does not need to be fixed. It works just like it was designed. For me, the trigger on the Sigma was about the same, maybe lighter than my High Standard.

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SW40VE Sigma
Ruger SR9c