I have not done anything at all, as I have only shot one of my M219's, in .30-30, years ago. I think I may have mentioned earlier as a quick fix (slight) improvement, to add a trigger shoe. I saw one rifle recently on the internet with a trigger shoe. There is one paragraph in the December 1962 Shooting Times Magazine (can be found frequently on Ebay for about $8.00) on improving the trigger pull by smoothing the sear. The article is: Savage Single Shot Action, by Frank de Haas. Supposedly this can be done without disassembly. I personally, would not attempt to do this, but have my gunsmith do it. I suppose that would make an interesting addition to my book, to do this and have pictures showing the procedure. While the outside of these guns, especially the early ones, have a very nice finish, most of the internal parts are crude by most standards. I am sorry I cannot be of more help. Maybe some of the other readers? I think Joe
Summitt had told me that he worked on his trigger pull on some of his guns.