I was at the Vintagers in September and when shooting my 12ga I noticed the left hammer had a very light trigger pull. In fact, at one point it went off when I was just putting my finger into the 2nd trigger while moving to the second target.
So that leads me to this problem. I have taken the locks off and one is very clean, the other, the left lock, the one with the light trigger pull, was rusty/dirty.
Hopefully, in the pictures, you can see the difference.
dirty_locks.jpg
clean_locks.jpg
I did clean it up some.
It looks like the sear on the lock is worn, I'll post some pictures shortly.
(the lower picture refuses to stand upright
I think I tried 10 times to upload it, even rotated the photo to no avail)