I get what in a pistol you'd call a "3 point jam'. More often than not. Working the bolt I have to cycle it half way (till it stops), back it up a hair, then go forward. Doesn't seem to be related to bullet, OAL, or crimp. I'm thinking of gently breaking the edges of the chamber mouth and polishing.
Extraction issue are it leaves cases fully in the chamber with seemingly no rhyme or reason.
I need to pull the extractor off and check it out under magnification. The extractor spring doesn't seem particularly strong to me either. I'm thinking it could use a little help.