When preparing ammunition and residue for turn-in, they must be:

When preparing ammunition and residue for turn-in, it is essential to pack and transport them separately to ensure safety and compliance with regulations. This separation minimizes the risk of accidental ignition or other hazardous situations that could arise from mixing live ammunition with residues.

By keeping these items distinct, it also aligns with hazardous materials handling procedures, which prioritize risk management and safety for personnel involved in the transport process. Ensuring that residue does not come into contact with live ammunition is crucial, as it reduces the potential for contamination and allows for proper inspection and processing of both items during the turn-in procedures.

In this context, the other options may imply methods that could lead to unsafe handling practices or violate safety protocols. Therefore, the requirement to pack and transport ammunition and residue separately underscores the importance of adhering to established guidelines for both safety and regulatory compliance.