Jones: That’s something I haven’t tried. Will give it a go. Thanks!Quick test:
Clear the weapon, remove the barrel, then put an empty, fired case on the bolt face. Next slide the barrel back into the trunnion and see if you feel any resistance as the case enters the chamber. If so there's a misalignment problem.
With a bright light (might also have to remove the grip assy for better illumination), you may also be able to look down the bore to see where/what direction the empty case to chamber mouth is.
If everything lines up, we're back to ammo as the most likely culprit.