For extraction/ejection problems: Check out the extractor for any damage. You could slide an empty casing between the extractor and slide to see how tight it holds the case. If the extractor won't hold it you may have a bad extractor. If Taurus replaced the extractor it would be annotated on the accompanying work order. Even if it was replaced if it won't hold the case it won't eject properly
For feed problems: If you have an additional magazine try it and see if the problem is related to one mag or both. Another thing you might try is to fire with the magazine against the table with some downward pressure to ensure the mag release or magazine is not worn or damaged. If and the mag could sit low enough to effect the feed.
If I have misstated any information, others with more knowledge, will be along to correct and add troubleshooting help.
For feed problems: If you have an additional magazine try it and see if the problem is related to one mag or both. Another thing you might try is to fire with the magazine against the table with some downward pressure to ensure the mag release or magazine is not worn or damaged. If and the mag could sit low enough to effect the feed.
If I have misstated any information, others with more knowledge, will be along to correct and add troubleshooting help.