Related Clues:

• BBs et al.
• Bullets, perhaps
• Battle rounds
• A few rounds, perhaps
• A loaded gun is full of it (Abbr.)
• Missiles and the like
• Gun shop stock
• Snowballs, at times
• 'Bullets'
• Barrel filler
• Peas, for pea shooters
• Munitions, slangily
• Firing range rounds
• It's effective only when fired
• Magazine pieces?