Tom,
I just got in from shooting a few rounds through my 69A. That gun is amazing! It shoots WMT into a hole that is just out of round at 25 yards. (after I cleaned it good)
I tried some cheap HV ammo and it didn't like any of it! I was discouraged and cleaned it real good and It shoots the WMT almost as good as my Anschutz. Not quite though
I did help my triger a lot. I cut the spring off a little and streatched it out a little. Then I took an Arkansas stone and straightened up the face of the firing pin catch just a little, as well as the trigger mating surface. The problem with the 69A trigger. other than the simplistic design, is that for the trigger to realease, it actually has to pull the firing pin spring back a little, and that is where the added weight comes from. The Ruger 77/22 has the same problem of the angle of the mating surfaces, and I also have done a lot for that trigger.
After I cleaned up the mating surfaces, I adjusted the trigger spring until it would just cock every time and not fire when banged on the floor. I put some glue on the adjustment threads and it has worked great ever since. It is a big improvement.
As dkemper said above, I don't think you can do anything about overtravel. I looked at that and noticed that as the firing pin is released, the part of the firing pin that travels across the top of the trigger catch is actually cut on an incline and if the trigger did not duck down out of the way completely it would interfere with the forward travel of the firing pin and possible cause FTF. I thought about grinding the incline flat, but it is acceptable as it is and I decided to leave well enough alone
