Thread: Fixin stuff

Lots of jumping to cause, and it well may be a tired main spring, but the first thing to check with any misfire is primer indentation. After assessing that then head off on the potential causes, easiest ones first. Some pictures of the misfired case heads/primers would be useful.
Potential causes (mostly already covered in thread) primers not seated correctly, excessive full length sizing, dodgy primers, weakened main spring, damaged firing pin tip (rare), firing pin protrusion incorrect (had this happen progressively on an LSA Tika), crap inside bolt/congealed snot/oil. And so on.
A weakened main spring is less inclined to give misfires and more inclined to give inconsistent primer ignition and high ES of velocity. On later model Sakos it is easy to check main spring - if you can easily decock and recock by hand the spring is getting weak. And Savage1 is correct.