Final answer:
The moisture protective bag on the M82 primer should be opened just before using the primer to prevent exposure to moisture.
Step-by-step explanation:
The moisture protective bag on the M82 primer should be opened just before using the primer.
Opening the bag too early can expose the primer to moisture in the air, which could affect its performance.
Therefore, it is important to open the bag when you are ready to use the M82 primer to ensure its effectiveness.