I have a Buckmark that like yours after many years of shooting began to regularily give FTF from light firing pin strikes. All the usual things like cleaning and tightening the screw didn't work so I took it to a gunsmith. After he worked with it a while he decided the firing pin had shortened from years of usage and stretched it a bit (a couple thousandth) which corrected my problems. Mine still feeds a ejects fine but I've replaced the magazine after the original came apart. Clean up the magazine as it could be the source of your feed problem and you may need a new extractor for the ejection problem or perhaps a change in ammo. When I get extraction problems with my Buckmark a good scrubing of the chamber, barrel face, extractor slot, bolt face and extractor with bore solvent and soft tooth brush solves the problem.