Annual shotgun proficiency training must include a minimum of rounds of duty ammunition fired at a range of at least 15 yards.

5 rounds

Explanation:

According to my research on police training requirements, I can say that based on the information provided within the question training must include a minimum of 5 rounds of duty ammunition fired at a range of at least 15 yards. This is so that law enforcement officers are acquainted with the weapon and are prepared for its use if necessary.

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