Is the follower running fully to the top, or is it cocking to some degree?
If it is cocking, so that it allows the round to drop, then possible the spring is walking, and not staying put at its bottom leg. A dab of epoxy, with realease agent on the spring, will give it a positive locator to stop walking.
That, maybe combined with tuning the extractor. I ended up replacing my follower (LA), with a different production unit, think it was a Win, but may have been a Rem.
Last edited by GaryVA; 02/11/17.