I originally posted my trigger polishing job on the .45-70 forum:
decent trigger pull now
As typical of lever actions, my 1895GBL trigger was a little rough, with a slight "catch" or "notch" in its travel, and heavy of course. I don't want the trigger to be "sharp as glass" or any such, because it has to be safe from bumping, etc. I used the Buck honing stones (Wa****a and Arkansas) for much of the action work, but just the fine Arkansas stone and 800 and 1000 grit paper on the sear and hammer notch. I made sure the angles didn't change; the idea is that the sear has to go uphill as it disengages from the hammer. If it is sliding level, or worse downslope, you will have an unsafe trigger. I don't like to bend the spring as that creates stress risers and it is also hard to predict the effects, both short- and long-term. You can decrease the depth of the notch in the hammer somewhat, say 30%, if you leave the edge sharp and the angle the same. The easy way for me was to watch the angle carefully while drawing the hammer across a diamond knife sharpening flat stone. then polish with the Arkansas stone and work to 1000 grit aluminum oxide paper. That will reduce creep, and weight of pull some, as the hammer does not have to be pulled back so far by the trigger as the sear runs "uphill." Look at the parts and you will see that a big reason for weight of trigger pull is that the trigger is pulling the hammer back farther. Just don't overdo it and make the notch too shallow. Better to r&r the hammer a few times than to cut too much and make the notch unreliable at all. I made a trigger pull gauge from stiff wire and pieces of steel, including small washers that I weighed on a precision balance. The trigger now is smooth, has minimal creep, and has a 4.14 pound pull.
The above procedures are my opinion, and not intended to advise you. Do what you are comfortable with.