Wiktionary
n. shotgun cartridge having only a single projectile , with oblique grooves on the projectile causing it to spin and thus increase accuracy.
Usage examples of "rifled slug".
I took the shotgun and carefully reloaded with rifled slug shells because Howard deserved only the best.
The first rifled slug had killed the aurochs, but he'd put the whole six-round magazine into the beast, all at the head.
The way he always pictured source evidence: the automobile the paint chip had scraped off of, the finger that had lost the nail, the gun barrel that had discharged the rifled slug found in the victim’.
The way he always pictured source evidence: the automobile the paint chip had scraped off of, the finger that had lost the nail, the gun barrel that had discharged the rifled slug found in the victim's body.