Just for fun, check out your firing pin retainer too.
Have a Champion that was having lots of trouble (not like yours though) I had at least 1 FTE in every magazine. Went to the local gunsmith for a new extractor, and he showed me that the FP retainer was bent. (Just from the hammer hitting it) Brought a new one, non-MIM. He also tweaked the extractor, and the pistol been 100% since.
Have a Champion that was having lots of trouble (not like yours though) I had at least 1 FTE in every magazine. Went to the local gunsmith for a new extractor, and he showed me that the FP retainer was bent. (Just from the hammer hitting it) Brought a new one, non-MIM. He also tweaked the extractor, and the pistol been 100% since.