In fact, you want a carry gun to be as stock as possible. Plan for the worst casr scenario, that you'll be picked apart in court, and you want to give the liberal anti-gun soccer mom prosecutor as little to use against you as possible. If they have an expert witness (i.e. a local gunsmith) say that your gun was "altered" and has a "hair trigger" it will look worse.

The 10-10 I keep in my "car safe" has a heavy mainspring made for modern MIM and frame mounted firing pin S&W's, as well as a new, heavy rebound spring. It's still a smooth, but heavy pull in DA,and SA is heavy too....... but there's NO way anyone could ever say it's been altered or has a "hair trigger".

I also carry one of my stock Ruger Service Sixes a lot, and anyone who owns a bone stock Ruger DA revolver knows that there's no way the trigger pull can be described as light.