I bought a new 686+-6 back around 2004 or so. When I first tried it out, I discovered that the factory trigger pull was so stiff I could scarcely keep from pulling the muzzle downward when I fired it. There was just no way I was going to put up with that. I promptly installed a Wolff reduced-power kit and a Cylinder & Slide extended firing pin for insurance. I have not had a single light primer strike/FTF with that gun.[NOTE: the C&S firing pin doesn't help with positive ignition because it's longer, but because it has a cone-shaped tip. This provides for a deeper dent with a lighter hammer blow. The stock pin has a hemispherical tip, which requires a heavier hammer blow.] And yes, it is a home defense gun.

If I had it to do over, I would probably have chosen another company's spring kit. The Wolff hammer spring has a rib in it in which the strain screw doesn't fit very well. It will also relax over time and need to be replaced.

Hope this is somewhat helpful.
Andy