How do unit personnel identify which residue to keep for turn-in?

The correct answer is rooted in the fact that the ASP Standard Operating Procedure (SOP) provides the most authoritative and systematic guidance for unit personnel regarding ammunition turn-ins. The SOP outlines specific procedures, protocols, and responsibilities that need to be followed, ensuring compliance with regulations and standards set forth by higher command.

In contrast, while a briefing by the Range Ammunition NCO may provide useful information about ammunition handling and residue, it does not serve as a comprehensive guide for turn-in procedures. Similarly, commander's guidance is valuable in terms of establishing priorities and intent but may not address the detailed, standardized processes necessary for residue identification. Documented inventory reports can provide insights into the ammunition on hand, but they lack the procedural specifics required for identification and turn-in processes, which the SOP covers thoroughly.

Therefore, the SOP stands out as the definitive resource for ensuring that unit personnel can correctly identify which residues to keep for turn-in, aligning with established protocols and regulatory compliance.