Answer :
Final answer:
Round ball is not commonly used in a muzzleloader.
Explanation:
In a muzzleloader, a bullet, bolt, round ball, and shot are types of projectiles that can be used. However, (C) round ball is not a type of projectile commonly used in a muzzleloader. A round ball is a single solid projectile that is usually used in a smoothbore muzzleloader. It is not typically used in a rifled muzzleloader since it does not take full advantage of the rifling to improve accuracy.
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