+1 min the Jerry Miculek Video on Trigger Job. And watch it more than once before you open up that side plate. Just a thorough cleaning can improve a lot. Scrubbing out the interior then selectively removing imperfections from a couple of parts will help. A reduced (13 - 14 lb) rebound spring can do wonders. I do not advocate replacing the mainspring, especially on a .22 RF. In Jerry's words, "just pass the stone over the part". Do not put any pressure on the part when stoning. Stay away from the single action sear it's pricey to replace parts.

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H Richard
SWCA1967 SWHF244