Which round has six grooves along the side of the case and contains no projectile or propellants, used for training purposes?

Which round has six grooves along the side of the case and contains no projectile or propellants, used for training purposes?

• A. M199
• B. M200
• C. Dummy Round
• D. Blank Round

Answer: (C)

Focus on identifying inert practice ammunition. A dummy round is designed to look like a real cartridge but contains no projectile and no propellant. That combination makes it safe for training because you can cycle it through a firearm, practice loading, chambering, and ejection, and perform safety checks without the risk of discharge. The six grooves along the side of the case are a distinctive feature used to mark these inert training cartridges, helping shooters recognize them at a glance. In contrast, live rounds include a projectile and propellant, and blanks contain propellant (but no projectile) and still produce a muzzle blast, so they’re not inert for dry-fire training.

Focus on identifying inert practice ammunition. A dummy round is designed to look like a real cartridge but contains no projectile and no propellant. That combination makes it safe for training because you can cycle it through a firearm, practice loading, chambering, and ejection, and perform safety checks without the risk of discharge. The six grooves along the side of the case are a distinctive feature used to mark these inert training cartridges, helping shooters recognize them at a glance. In contrast, live rounds include a projectile and propellant, and blanks contain propellant (but no projectile) and still produce a muzzle blast, so they’re not inert for dry-fire training.