Give it a good cleaning if that doesn't fix it send it back to Taurus. I bought a 22 tracker awhile back that wouldn't turn the cylinder all the time when shooting. Sent it to Taurus expecting never to see it again with all the BS I've read online. Had it back in 8 working days, completely fixed, free of charge. Was so impressed I sent my 650 in to them. Nothing wrong with it other than it was getting alittle play in the cylinder after thousands of rounds of hot 357. Granted it took them 14 days on it but once again, returned good as new and free of charge.
John A. Monroe, Never Forgive, Never Forget, Blood Pays Blood