What's the difference between smoothbore and unrifled?

Smoothbore

Definition:

• (a.) Having a bore of perfectly smooth surface; -- distinguished from rifled.
• (n.) A smoothbore firearm.

Example Sentences:

• (1) Smoothbore shotgun barrels can fire cartridges with common pellet loads as well as shotgun slugs and rubber bullets.

Unrifled

Definition:

Example Sentences: