Possible fouling under the ejection star? Check that and clean it well. That may take care of the problem.
If that doesn't take care of it, Taurus often has issues with the forcing cone causing binding. My Taurus M85 had the same issues as you describe. After the issues and then dealing with Taurus's wonderful customer service, I no longer trusted the gun so I sold it.
Anyway, if a good cleaning doesn't work, try giving Taurus a call. Good luck.
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