There is that little "spring" trick that you can do, but with any advice you get on the net, you take matters into your own hands. I see no real problem with this so I'll pass along the information.....but you didn't hear me type it....
Take the screw out that holds in the trigger guard assembly, then push out the pin that holds the trigger into the frame. There is an "L" shaped spring that rides in the little hole in the front of the trigger. Take a small flat-blade screwdriver and give the "L" shaped spring a good push towards the front/top of the frame. This will take a little of the tension out of the spring.
Re-assemble and test, if it still feels a little stiff, repeat. I wouldn't do this more than twice, if you can't reduce the trigger pull with two stretches, don't overdo it, you probably need to send it to the 'smith.
BTW. While you've got it apart, you might consider putting a drop of Lucas Gun Oil on the sear and hammer surfaces. That stuff is slicker that snot on a doorknob!