I believe the bolt is the same as the .22LR. If so, I would take the firing pin (plate) out. Take note of the orientation of the two extraction plates so you don't mix them up. Also, the C spring that retains them has two slots in it, take note which way they are facing.
Thoroughly clean the firing plate, and stone off any burrs. Also clean the slot it fits in. I use automotive throttle body cleaner, and just use the residual lube from it, and add no extra lube.
When you reassemble scrunch the C spring between your fingers to tighten it up. It tends to stretch when you take it off. Put the firing plate in first, then the C spring. Last, slide the extractor plates in from the end. I find that stretches the spring the least. A weak spring is a frequent cause of failure to extract.
When assembled shade the bolt back and forth. The firing plate should rattle back and forth easily.
If that does not cure it, then have a look at the end of the firing plate. The outer part is designed to contact the barrel face to protect the chamber when you dry fire. It may be too long and preventing a firm strike of the rim. It can be filed down a bit to increase the depth of the strike.
Hope that helps,
