The first thing I would do is unload it, take the slide off, remove the barrel, put the slide back on and slowly work the slide on a full magazine, watch the case head slide under the extractor, it should go to the midway point of the case head easily but with some tension, what you are describing could be the case head binding on the way up, and different manufacturers have slightly different case head thicknesses, a thinner head would slide under the extractor easier. Also take some empty cases and work them by hand under the extractor and just feel how easy it is.
2nd, drop some loaded ammo in the barrel on the bench and see how easy they fall in, and to what depth, maybe the barrel has a tight chamber or not enough lead cut in the beginning of the rifling.
What you are describing to me sounds like the case has entered 90%. Should be quite solvable.
Extractor fit is an experience game, done a lot by feel, Although I do use an extractor tension gauge from Weigand. If your not comfortable, don't do it. If it seems it's the barrel, send it back to Para.
Good luck and keep us informed.