I'm building a dedicated 22 upper. I purchased a Taccom 4" barrel and Bolt. After install I went to try it out and it wouldn't feed, as in the round was getting jammed at an angle. I followed the polishing the feed ramp and chamber found in the "Important Rimfire Threads" and this made it so the round will get this far. Continued polishing does not help.
Yes there is a round in there, I just realized the extractor made it so you cannot see it.
Something else I noticed was that when putting the bolt in the upper receiver it did this:
Notice when looking at it from the rear it is not centered:
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I have tried different ammo, and charging handles. I have oiled the bolt and charging handle to reduce friction.
Other components:
DSG upper
Charging handles: Standard(from a S&W), Raptor, and BCM Gunfighter
Larue rail/barrel nut
Does have Taccoms plug in the buffer
Geissele S3G