I just scored a NIB Ruger M77 Mk2 in 7.62x39 and am in the process of installing a Timney Trigger. I've got too much sear engagement with the Timney sear but I have no problems with the Ruger sear in conjunction with the Timney trigger. I notice that there is a very small allen head that goes through the sear on the engagement surface. Has anyone attempted to adjust the sear. I may have to heat it up....the screw is tighter than a bull's a$$!