If it's doing this without a mag when you're dry cycling, then you can eliminate extractor and chamber problems. It could be lockup grooves or barrel bushing. The barrel bushing can be checked by disassembling the top end and check the to be sure that the bushing slides easily on the barrel, especially along the front 3/4 inch of the barrel. If that's fine, then I would concentrate on the locking grooves and look to see if the barrel hood itself is getting hung up on the breech walls. One other thing to check is the lug on the barrel to see if something has happened where the slide catch pin sits.
I hope this was some help. Depending on what you find, you should be able to fix it yourself.
Of course it could be something else, but these are the places I would look first.
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Really interesting....Don't ya think??
I hope this was some help. Depending on what you find, you should be able to fix it yourself.
Of course it could be something else, but these are the places I would look first.
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Really interesting....Don't ya think??