I know two people who’ve had these locks fail and lock the gun. Coworker had a .44 tracker he shot a lot and it locked while he was shooting. He bent something in the trigger group squeezing hard trying to make it fire and had to send it to Taurus. They fixed it. My brother has a tracker .357. He had shot a few boxes through it and it was riding in his trucks glove box. Got it out at my house and I dumped the ammo out of the cylinder to get a feel of it. When I pulled the trigger the hammer came halfway back and stopped. The lock had vibrated on. There’s accounts of this in many forums. These safety systems are trash. Taurus is trash for not removing them.