Originally Posted by NYC Drew
Some airlines require you to check the ammo in a separate bag.
Northwest tried that on my one time. But it was never officially in their regs. And it wasn't on the TSA regs. So they were fine. No one else has said anything. Worst case, you can lock the gun in it's case and put your ammo in your main bag. That's the worst I've ever heard from other fliers. Most often if they want anything they want it locked and people may not have room in the gun case.
But that's my experience. YMMV may vary.