In 8 Trips I have never taken the cardboard boxes. I use the inside white plastic not the one piece black so I can get all my ammo inside the box and never a single problem. Especially in Zim, they want to count the ammo anyway via the headstamp which is why I have found they could care less of the box.Have folks had any issues with ammo inside the locked case being stored in the generic brown plastic MTM ammo wallets, those like hip pocket holders that will hold usually like 8-12 rounds? I prefer to put ammo into a factory cardboard case, but for things like a 505 Gibbs? Didn't know if generic plastic inner case causes additional scrutiny.