I'll try the bore brush. The rifle has less than 200 rounds thru it. What should I look for regarding the extractor spring? I did look at it before and found a bunch of brass shavings. Also I noticed that the newer rifles are using a different buffer weight and spring. Is that something I should look into. I have emailed POF and they said to make sure I'm cleaning the rifle correctly etc. I am. Also I was using the factory mag and having these issues.[/QUOTE
The first step with the extractor you have done, make sure that there is nothing binding it or keeping it pushed outward. Also make sure that the spring is not too loose, this will cause the extractor to ride back over the case rim instead of grabbing it and pulling it out. The new buffer and spring was to address the issue of the bolt hitting the buffer tube where it screws in. Sometimes with the old tube and spring it would dip down causing ware in that area and a weak spring can cause bolt bounce as well. If you see any ware marks on the front of you buffer tube this is not normal.
Also don't over lube these guns, some do not function well with lube. Just a (VERY) light coating is needed and not very often. I hope this helps it would suck to have to send it in for repair when you are that far away, but if you do I'm sure they will square you away asap.