Where are you guys flying out of where the TSA has your firearm and unlocked bag/case?

Per the TSA web page the firearm owner/passenger should be the only person to ever have control of the keys and access to the interior of the bag.

https://www.tsa.gov/travel/transporting-firearms-and-ammunition

Years ago, they used to take the keys from you and "inspect" the firearm case, however that should not be the case now. The owner/passenger should unlock and add the "Unloaded" tag to the bag, lock the bag, and the ticket agent should take the bag down to the TSA for them to X-Ray. Neither TSA or the airline is legally allowed to open the case or have possession of your keys.