Are you comfortable dissassembling trigger group?
Polish to a mirror (1000grit on a hard surface and do not change angles, finish off with cotton dremel tip with polishing compound) all the parts interacting with each other. ie; sear to hammer, disconector to sear, etc... all action parts that friction together be polished.
Then use this link to change engagement angle on your hammer.
http://www.rimfirecentral.com/forum...etus+hungwell#/topics/122386?page=1&_k=mtuns0
Match trigger for free if you're handy!