@Jhon couple of things, when you say no problem with the bolt lift, was it smooth all the way to the top or was there some resistance toward the end of the lift giving a small click?
And assuming you still have the offending cases , if you chamber them again in their current fired state do they give the same resistance on extraction? if they do color them with black felt tip chamber and see where the binding is, this issue normally shows just in front of the web.
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